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        <span class="title" target="_blank">定义周期幅值</span>



        <a class="tidown" href="../Blog.html">返回主页</a>
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      <div class="center">
        <table xmlns:mml="http://www.w3.org/1998/Math/MathML" class="table1" id="table11"><tbody><tr><td><table class="DocHeader"><tbody><tr><td class="DocHeader1" colspan="2"><h1 _msttexthash="12121941" _msthash="2">振幅曲线</h1></td></tr><tr><td class="DocHeader4" colspan="2"></td></tr><tr><td class="DocHeader3"><table class="DocHeaderIntro" id="table12"><tbody><tr><td class="Intro1Only"><p class="abstract">
        </p><p _msttexthash="21460699" _msthash="3">振幅曲线：</p>
        <ul xmlns="http://www.w3.org/1999/xhtml" class="ul">
         <li class="li">
          <p xmlns="" _msttexthash="619665254" _msthash="4">允许负载、位移、
       以及在整个步骤中给出的其他规定变量（使用步骤时间）
       或在整个分析过程中（使用总时间）;</p>
         </li>
      
         <li class="li">
          <p xmlns="" _msttexthash="2494645062" _msthash="5">可以定义为数学函数（例如正弦
       变体），作为时间点的一系列值（例如数字化的
       地震加速度时间记录），作为用户自定义的定义
       通过用户子例程，或者在 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/Standard</span> 中，
       作为基于解因变量计算的值（例如
       超塑性成形问题中的最大蠕变应变率）;和</p>
         </li>
      
         <li class="li">
          <p xmlns="" _msttexthash="175896188" _msthash="6">可以用任意数量的边界条件来引用，
       负载和预定义字段。</p>
         </li>
      
        </ul>
      
        <p _msttexthash="31928390" _msthash="7">讨论以下主题：</p><ul><li><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-t-AmplitudeCurves-sma-topic1" id="toc_rg" title="" _msttexthash="12121941" _msthash="8">振幅曲线</a></li><li><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-time" id="toc_rg" title="" _msttexthash="16205527" _msthash="9">定义时间段</a></li><li><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-data" id="toc_rg" title="" _msttexthash="33695896" _msthash="10">指定相对或绝对数据</a></li><li><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-datadefine" id="toc_rg" title="" _msttexthash="18010499" _msthash="11">定义振幅数据</a></li><li><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-data-actuator" id="toc_rg" title="" _msttexthash="56697524" _msthash="12">通过协同仿真定义执行器振幅</a></li><li><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-bc" id="toc_rg" title="" _msttexthash="62721490" _msthash="13">将振幅定义与边界条件结合使用</a></li><li><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-t-UsingAnAmplitudeDefinitionWithSecondaryBaseMotionInModalDynamics-sma-topic19" id="toc_rg" title="" _msttexthash="123773689" _msthash="14">在模态中使用具有次级基本运动的振幅定义
       动力学</a></li><li><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-many" id="toc_rg" title="" _msttexthash="28082275" _msthash="15">定义多条振幅曲线</a></li><li><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-t-ScalingAndShiftingAmplitudeCurves-sma-topic21" id="toc_rg" title="" _msttexthash="34311485" _msthash="16">缩放和偏移幅度曲线</a></li><li><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-file" id="toc_rg" title="" _msttexthash="37427013" _msthash="17">从备用文件中读取数据</a></li><li><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-baseline" id="toc_rg" title="" _msttexthash="54359305" _msthash="18"><span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">阿巴库斯/标准</span>中的基线校正</a></li></ul>
      <p></p></td></tr></tbody></table></td><td class="DocHeader2"><table class="DocTopics" id="table13"><tbody><tr><td class="TopicsTitle" _msttexthash="12361479" _msthash="19">相关主题</td></tr><tr><td><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-prescribedover.htm" class="link" title="Prescribed conditions allow you to model nonzero initial conditions, boundary conditions, loads, and predefined fields." _msttexthash="18101616" _msthash="20">关于规定条件</a></td></tr><tr><td height="8px"></td></tr><tr><td class="TopicsTitleNormal" _msttexthash="16029065" _msthash="21">在其他指南中</td></tr><tr><td><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" class="link" title="Define an amplitude curve." _msttexthash="5726279" _msthash="22">*波幅</a></td></tr><tr><td><a href="https://abaqus-docs.mit.edu/2017/English/SIMACAECAERefMap/simacae-m-Amp-sb.htm" class="link" title="Amplitudes allow you to specify arbitrary time or frequency variations of load, displacement, and some interaction attributes throughout a step using step time or throughout an analysis using total time. The Amplitude toolset allows you to create and manage amplitudes." _msttexthash="15863406" _msthash="23">振幅工具集</a></td></tr></tbody></table></td></tr></tbody></table>
      
      
      <div class="body conbody abquserssection-body">
      <div class="section keygroup smakeygroup">
      <p class="p keysentry abqproductname" _msttexthash="5481346" _msthash="24"><span class="keyclass gen-from-abqproductname" _istranslated="1">产品</span><span class="ph key std" _istranslated="1">Abaqus/Standard</span> Abaqus/<span class="ph key exp" _istranslated="1">Explicit Abaqus/</span><span class="ph key cae" _istranslated="1">CAE</span></p></div></div>
      
      <div class="related-links">
      <div xmlns="http://www.w3.org/1999/xhtml" class="nested1 topic concept sma-topic" id="simaprc-c-amplitude-t-AmplitudeCurves-sma-topic1">
      <h2 xmlns="" class="topictitle2 title" _msttexthash="12121941" _msthash="25">振幅曲线</h2>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="6470624849" _msthash="26">默认情况下，荷载、边界条件和预定义字段的值
       在整个步骤中随时间线性变化（斜坡函数），或者它们
       立即应用并在整个步骤中保持不变（步骤
       函数）- 请参阅<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEANLRefMap/simaanl-c-over.htm" title="An analysis is defined in Abaqus by:" _istranslated="1">定义分析</a>。
       然而，许多问题需要更详细的定义。例如
       不同的幅度曲线可用于指定不同时间变化
       载荷。一个常见的例子是热负荷和机械负荷的组合
       瞬态：通常温度和机械负载具有不同的时间
       步骤中的变化。可以使用不同的幅度曲线来指定
       这些时间变化中的每一个。</p>
      <p _msttexthash="854454315" _msthash="27">其他示例包括地震荷载下的动态分析，其中
       振幅曲线可用于指定加速度随时间的变化，
       和水下冲击分析，其中使用振幅曲线来指定
       事件压力剖面。</p>
      <p _msttexthash="877413004" _msthash="28">振幅定义为模型数据（即，它们不依赖于阶跃）。
       必须命名每个振幅曲线;然后从
       荷载、边界条件或预定义字段定义（请参见<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-prescribedover.htm" title="Prescribed conditions allow you to model nonzero initial conditions, boundary conditions, loads, and predefined fields." _istranslated="1">关于规定条件</a>）。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="29">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="30">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Name:</span> <span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span></pre></div>
      </div>
      </div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="nested1 topic concept sma-topic" id="simaprc-c-amplitude-time">
      <p xmlns=""><map name="FPMap1"><area href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#hj-top" title="Back to Top" shape="rect" coords="416, 0, 435, 10"></map><img border="0" src="blogpic/butix_top_wline.png" width="436" height="11" usemap="#FPMap1"></p><h2 xmlns="" class="topictitle2 title" _msttexthash="16205527" _msthash="31">定义时间段</h2>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="633903153" _msthash="32">每个振幅曲线都是时间或频率的函数。定义的振幅
       作为频率函数用于<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEANLRefMap/simaanl-c-steadystdyndirect.htm" _istranslated="1">直接解</a>稳态动态分析<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEANLRefMap/simaanl-c-steadystdyn.htm" _istranslated="1">基于模式的稳态动态分析和</a><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEANLRefMap/simaanl-c-eddycurrent.htm" _istranslated="1">涡流分析</a>。</p>
      <p _msttexthash="452897731" _msthash="33">定义为时间函数的振幅可以用<span xmlns="http://www.w3.org/1999/xhtml" class="ph sma-emphasis" _istranslated="1">步长时间</span>（默认值）或<span xmlns="http://www.w3.org/1999/xhtml" class="ph sma-emphasis" _istranslated="1">总时间</span>给出。这些时间措施在<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEMODRefMap/simamod-c-conventions.htm" _istranslated="1">公约</a>中作了规定。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="34">输入文件使用情况</p><p xmlns="" _msttexthash="41049528" _msthash="35">使用以下选项之一：</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">TIME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">STEP TIME</span> (default)
      <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">TIME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">TOTAL TIME</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="36">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: any type: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Time span: Step time</span> or <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Total time</span></pre></div>
      </div>
      
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-t-ContinuationOfAnAmplitudeReferenceInSubsequentSteps-sma-topic2">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="66857804" _msthash="37">在后续步骤中继续使用幅度参考</h3>
      
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="516620663" _msthash="38">如果边界条件、载荷或预定义场是指振幅
       曲线和规定的条件不会在后续步骤中重新定义，
       以下规则适用：</p>
      <ul xmlns="http://www.w3.org/1999/xhtml" class="ul">
        <li class="li">
         <p xmlns="" _msttexthash="201889246" _msthash="39">如果相关振幅以总时间给出，则
       规定的条件继续遵循振幅定义。</p>
        </li>
      
        <li class="li">
         <p xmlns="" _msttexthash="510806114" _msthash="40">如果未给出相关的振幅，或者振幅在
       就步进时间而言，规定的条件在幅度上保持不变
       与上一步的结束相关联。</p>
        </li>
      
      </ul>
      </div>
      </div>
      </div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="nested1 topic concept sma-topic" id="simaprc-c-amplitude-data">
      <p xmlns=""><map name="FPMap1"><area href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#hj-top" title="Back to Top" shape="rect" coords="416, 0, 435, 10"></map><img border="0" src="blogpic/butix_top_wline.png" width="436" height="11" usemap="#FPMap1"></p><h2 xmlns="" class="topictitle2 title" _msttexthash="33695896" _msthash="41">指定相对或绝对数据</h2>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="41675231" _msthash="42">您可以选择为
       振幅曲线。</p></div>
      
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-t-RelativeData-sma-topic4">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="11287276" _msthash="43">相关数据</h3>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="641659447" _msthash="44">默认情况下，将振幅幅度作为
       规定条件定义中给出的参考量级。此方法
       当相同的变化适用于不同的荷载类型时，尤其有用。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="45">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">VALUE</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">RELATIVE</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="46">Abaqus/CAE 用法</p>
      <p xmlns="" _msttexthash="68394417" _msthash="47">振幅幅度在<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/CAE</span>中总是相对的。</p></div>
      </div>
      </div>
      
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-t-AbsoluteData-sma-topic5">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="11751363" _msthash="48">绝对数据</h3>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="348301720" _msthash="49">或者，您可以直接给出绝对幅度。当此方法
       使用，规定的条件定义中给出的值将是
       忽视。</p>
      <p _msttexthash="4178310721" _msthash="50">绝对幅度值通常不应用于定义
       连接到梁或壳的节点的温度或预定义场变量
       元素作为参考表面上的值以及渐变或
       截面上的梯度（默认截面定义;请参阅使用分析期间集成的梁截面定义截面行为和使用<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEELMRefMap/simaelm-c-usingbeamsection.htm" _istranslated="1">分析期间集成</a>的壳截面<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEELMRefMap/simaelm-c-usingshellsection.htm" _istranslated="1">定义截面行为</a>）。
       因为温度字段和预定义字段中给出的值是
       忽略，绝对幅度值将用于定义
       温度和梯度以及场和梯度分别。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="51">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">VALUE</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">ABSOLUTE</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="52">Abaqus/CAE 用法</p>
      <p xmlns="" _msttexthash="65658593" _msthash="53">绝对振幅幅度在 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/CAE</span> 中不受支持。</p></div>
      </div>
      </div>
      </div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="nested1 topic concept sma-topic" id="simaprc-c-amplitude-datadefine">
      <p xmlns=""><map name="FPMap1"><area href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#hj-top" title="Back to Top" shape="rect" coords="416, 0, 435, 10"></map><img border="0" src="blogpic/butix_top_wline.png" width="436" height="11" usemap="#FPMap1"></p><h2 xmlns="" class="topictitle2 title" _msttexthash="18010499" _msthash="54">定义振幅数据</h2>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="421894525" _msthash="55">振幅随时间的变化可以通过多种方式指定。
       振幅随频率的变化只能以表格或形式给出
       等间距形式。</p></div>
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-data-tabular">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="19457022" _msthash="56">定义表格数据</h3>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="9598903106" _msthash="57">选择表格定义方法（默认）以定义幅度曲线
       作为时间尺度上方便点的值表。<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">根据需要，Abaqus</span> 在这些值之间进行线性插值。默认情况下，在 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/Standard</span> 中，
       如果必须计算函数的时间导数，则一些平滑是
       应用于时间导数不连续的时间点。在
       相反，在 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/显式</span>中，不应用默认平滑（除了相关的固有平滑
       具有有限的时间增量）。您可以修改默认平滑值
       （平滑将在下面标题“使用
       具有边界条件的振幅定义“）;或者，平稳的步骤
       可以定义幅度曲线（参见下面的“定义平滑步长数据”）。</p>
      <p _msttexthash="856939278" _msthash="58">如果振幅变化迅速，就像地面加速度一样
       例如，地震 - 必须确保在
       分析足够小，可以准确地获取振幅变化，因为 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus</span> 只会在对应于
       正在使用的增量。</p>
      <p _msttexthash="1864195671" _msthash="59">如果步骤中的分析时间小于数据的最早时间
       存在于表中，<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus</span> 将表中的最早值应用于小于
       最早的制表时间。同样，如果继续分析步骤时间
       超过上次在表中定义数据的时间，最后一个值
       该表将应用于所有后续时间。</p>
      <p _msttexthash="64652939" _msthash="60"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-data-tabular__simaprc-c-pamplitude-tabular" _istranslated="1">图 1</a> 显示了表格输入的几个示例。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="61">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">TABULAR</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="62">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Tabular</span></pre></div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig" id="simaprc-c-amplitude-data-tabular__simaprc-c-pamplitude-tabular"><span xmlns="" class="figcap" _msttexthash="40438983" _msthash="63">图1.表格振幅定义示例。</span>
        
        <br><img xmlns="" class="image" src="blogpic/pamplitude-tabular-nls.png"><br>
      </div>
      </div>
      </div>
      
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-data-eqspaced">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="26447356" _msthash="64">定义等间距数据</h3>
      <div xmlns="" class="body conbody sma-topic-body">
      <p><font _mstmutation="1" _msttexthash="1381952390" _msthash="65">选择等间距定义方法以给出振幅列表
       从指定的时间值开始的固定时间间隔的值。<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _mstmutation="1" _istranslated="1">Abaqus</span> 在每个时间间隔之间线性插值。您必须指定固定的
       给出幅度数据的时间（或频率）间隔，</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-1-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot; mathvariant=&quot;normal&quot;&gt;&amp;#x394;&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-1" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-2" class="mjx-mrow"><span id="MJXc-Node-3" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-4" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="83356" _msthash="66">Δ</span></span><span id="MJXc-Node-5" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-6" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="67">t</span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mrow class="- topic/foreign "><mi class="- topic/foreign " mathvariant="normal" _mstTextHash="83356" _mstHash="68">Δ</mi><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="69">⁢</mo><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="70">t</mi></mrow></math></span></span><script type="math/mml" id="MathJax-Element-1"><math class="- topic/foreign "><mrow class="- topic/foreign "><mi mathvariant="normal" class="- topic/foreign ">Δ</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">t</mi></mrow></math></script></span><font _mstmutation="1" _msttexthash="76738051" _msthash="71">.
       您还可以指定第一个
       给出振幅，</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-2-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-7" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-8" class="mjx-mrow"><span id="MJXc-Node-9" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-10" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="72">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-11" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="73">0</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="74">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="75">0</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-2"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub></math></script></span><font _mstmutation="1" _msttexthash="13950859" _msthash="76">;
       默认值为</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-3-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-12" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-13" class="mjx-mrow"><span id="MJXc-Node-14" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-15" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="77">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-16" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="78">0</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="79">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="80">0</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-3"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub></math></script></span><font _mstmutation="1" _msttexthash="1779635" _msthash="81">=0.0。</font></p>
      <p _msttexthash="1864195671" _msthash="82">如果步骤中的分析时间小于数据的最早时间
       存在于表中，<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus</span> 将表中的最早值应用于小于
       最早的制表时间。同样，如果继续分析步骤时间
       超过上次在表中定义数据的时间，最后一个值
       该表将应用于所有后续时间。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="83">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">EQUALLY SPACED</span>,
      <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">FIXED INTERVAL</span>=<span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-4-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot; mathvariant=&quot;normal&quot;&gt;&amp;#x394;&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation" style="font-size: 105%; position: relative;"><span id="MJXc-Node-17" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-18" class="mjx-mrow"><span id="MJXc-Node-19" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-20" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.401em; padding-bottom: 0.321em;">Δ</span></span><span id="MJXc-Node-21" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-22" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.401em; padding-bottom: 0.321em;">t</span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mrow class="- topic/foreign "><mi class="- topic/foreign " mathvariant="normal">Δ</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">t</mi></mrow></math></span></span><script type="math/mml" id="MathJax-Element-4"><math class="- topic/foreign "><mrow class="- topic/foreign "><mi mathvariant="normal" class="- topic/foreign ">Δ</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">t</mi></mrow></math></script></span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">BEGIN</span>=<span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-5-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 105%; position: relative;"><span id="MJXc-Node-23" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-24" class="mjx-mrow"><span id="MJXc-Node-25" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-26" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.401em; padding-bottom: 0.321em;">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-27" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.401em; padding-bottom: 0.401em;">0</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-5"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub></math></script></span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="84">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Equally spaced</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Fixed interval:</span> <span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-6-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot; mathvariant=&quot;normal&quot;&gt;&amp;#x394;&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-28" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-29" class="mjx-mrow"><span id="MJXc-Node-30" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-31" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.312em;">Δ</span></span><span id="MJXc-Node-32" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-33" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;">t</span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mrow class="- topic/foreign "><mi class="- topic/foreign " mathvariant="normal">Δ</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">t</mi></mrow></math></span></span><script type="math/mml" id="MathJax-Element-6"><math class="- topic/foreign "><mrow class="- topic/foreign "><mi mathvariant="normal" class="- topic/foreign ">Δ</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">t</mi></mrow></math></script></span></pre><p xmlns=""><font _mstmutation="1" _msttexthash="129795705" _msthash="85">第一个振幅的时间（或最低频率）
      给出，</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-7-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-34" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-35" class="mjx-mrow"><span id="MJXc-Node-36" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-37" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="86">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-38" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="87">0</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="88">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="89">0</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-7"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub></math></script></span><font _mstmutation="1" _msttexthash="49624835" _msthash="90">,
      在第一个表中表示
      细胞。</font></p></div>
      </div>
      </div>
      
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-data-periodic">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="18077982" _msthash="91">定义定期数据</h3>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="142749386" _msthash="92">选择周期定义方法，将振幅 <span xmlns="http://www.w3.org/1999/xhtml" class="ph mathterm" _istranslated="1">a</span> 定义为傅里叶级数：</p><div class="equation"><span class="MathJax_Preview" style="color: inherit;"></span><span class="mjx-chtml MJXc-display" style="text-align: left; margin-left: 3.333em;"><span id="MathJax-Element-8-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" style="font-size: 135%; position: relative;" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot; display=&quot;block&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mtable class=&quot;- topic/foreign &quot; rowspacing=&quot;0.2ex&quot; columnspacing=&quot;0.4em&quot;&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;right&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;left&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;munderover class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot; movablelimits=&quot;false&quot;&gt;&amp;#x2211;&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;n&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;N&lt;/mi&gt;&lt;/mrow&gt;&lt;/munderover&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;[&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;n&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;cos&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;n&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3C9;&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;B&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;n&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;sin&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;n&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3C9;&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;mtext class=&quot;- topic/foreign &quot;&gt;&amp;#xA0;for&amp;#xA0;&lt;/mtext&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2265;&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;right&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;left&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mtext class=&quot;- topic/foreign &quot;&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;for&amp;#xA0;&lt;/mtext&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;lt;&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;/mtable&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation"><span id="MJXc-Node-39" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-40" class="mjx-mrow"><span id="MJXc-Node-41" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-42" class="mjx-mtable - topic/foreign " style="vertical-align: -1.619em; padding: 0px 0.167em;"><span class="mjx-table"><span id="MJXc-Node-43" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-44" class="mjx-mtd - topic/foreign " style="padding: 0px 0.2em 0.044em 0px; text-align: right; width: 0.529em;"><span id="MJXc-Node-45" class="mjx-mrow" style="margin-top: 0.334em; margin-bottom: 0.165em;"><span id="MJXc-Node-46" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="93">一个</span></span></span></span><span id="MJXc-Node-47" class="mjx-mtd - topic/foreign " style="padding: 0px 0px 0.044em 0.2em; text-align: left; width: 25.716em;"><span id="MJXc-Node-48" class="mjx-mrow"><span id="MJXc-Node-49" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-50" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-51" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-52" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-53" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="94">一个</span></span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-54" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-55" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="95">0</span></span></span></span></span><span id="MJXc-Node-56" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-57" class="mjx-munderover - topic/foreign  MJXc-space2"><span class="mjx-itable"><span class="mjx-row"><span class="mjx-cell"><span class="mjx-stack"><span class="mjx-over" style="font-size: 70.7%; padding-bottom: 0.258em; padding-top: 0.141em; padding-left: 0.495em;"><span id="MJXc-Node-64" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-65" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em; padding-right: 0.085em;" _msttexthash="7098" _msthash="96">N</span></span></span></span><span class="mjx-op" style="padding-left: 0.136em;"><span id="MJXc-Node-58" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-59" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-size1-R" style="padding-top: 0.559em; padding-bottom: 0.559em;" _msttexthash="793611" _msthash="97">∑</span></span></span></span></span></span></span><span class="mjx-row"><span class="mjx-under" style="font-size: 70.7%; padding-top: 0.236em; padding-bottom: 0.141em;"><span id="MJXc-Node-60" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-61" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="10010" _msthash="98">n</span></span><span id="MJXc-Node-62" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-63" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="99">1</span></span></span></span></span></span></span><span id="MJXc-Node-66" class="mjx-mrow - topic/foreign  MJXc-space1"><span id="MJXc-Node-67" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">[</span></span><span id="MJXc-Node-68" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-69" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-70" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="100">一个</span></span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-71" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-72" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="10010" _msthash="101">n</span></span></span></span></span><span id="MJXc-Node-73" class="mjx-mi - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.188em; padding-bottom: 0.373em;" _msttexthash="4106544" _msthash="102">因为</span></span><span id="MJXc-Node-74" class="mjx-mi - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="10010" _msthash="103">n</span></span><span id="MJXc-Node-75" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="88179" _msthash="104">ω</span></span><span id="MJXc-Node-76" class="mjx-mrow - topic/foreign  MJXc-space1"><span id="MJXc-Node-77" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-78" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="105">t</span></span><span id="MJXc-Node-79" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="106">−</span></span><span id="MJXc-Node-80" class="mjx-msub - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-81" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-82" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="107">t</span></span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-83" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-84" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="108">0</span></span></span></span></span><span id="MJXc-Node-85" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span><span id="MJXc-Node-86" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-87" class="mjx-msub - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-88" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-89" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em;" _msttexthash="6006" _msthash="109">B</span></span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-90" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-91" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="10010" _msthash="110">n</span></span></span></span></span><span id="MJXc-Node-92" class="mjx-mi - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="2968238" _msthash="111">罪</span></span><span id="MJXc-Node-93" class="mjx-mi - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="10010" _msthash="112">n</span></span><span id="MJXc-Node-94" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="88179" _msthash="113">ω</span></span><span id="MJXc-Node-95" class="mjx-mrow - topic/foreign  MJXc-space1"><span id="MJXc-Node-96" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-97" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="114">t</span></span><span id="MJXc-Node-98" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="115">−</span></span><span id="MJXc-Node-99" class="mjx-msub - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-100" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-101" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="116">t</span></span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-102" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-103" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="117">0</span></span></span></span></span><span id="MJXc-Node-104" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span><span id="MJXc-Node-105" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">]</span></span></span><span id="MJXc-Node-106" class="mjx-mtext - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.373em;" _msttexthash="1822366" _msthash="118">为</span></span><span id="MJXc-Node-107" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="119">t</span></span><span id="MJXc-Node-108" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.497em;" _msttexthash="801255" _msthash="120">≥</span></span><span id="MJXc-Node-109" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-110" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-111" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="121">t</span></span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-112" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-113" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="122">0</span></span></span></span></span><span id="MJXc-Node-114" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="123">,</span></span></span></span></span></span><span id="MJXc-Node-115" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-116" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em 0px 0px; text-align: right;"><span id="MJXc-Node-117" class="mjx-mrow" style="margin-top: 0.334em; margin-bottom: 0.165em;"><span id="MJXc-Node-118" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="124">一个</span></span></span></span><span id="MJXc-Node-119" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0px 0px 0.2em; text-align: left;"><span id="MJXc-Node-120" class="mjx-mrow" style="margin-top: 0.059em;"><span id="MJXc-Node-121" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-122" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-123" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-124" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-125" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="125">一个</span></span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-126" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-127" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="126">0</span></span></span></span></span><span id="MJXc-Node-128" class="mjx-mtext - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.373em;" _msttexthash="1822366" _msthash="127">为</span></span><span id="MJXc-Node-129" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="128">t</span></span><span id="MJXc-Node-130" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.25em; padding-bottom: 0.373em;">&lt;</span></span><span id="MJXc-Node-131" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-132" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-133" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="129">t</span></span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-134" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-135" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="130">0</span></span></span></span></span><span id="MJXc-Node-136" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="131">,</span></span></span></span></span></span></span></span></span></span></span><span class="MJX_Assistive_MathML MJX_Assistive_MathML_Block" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML" display="block"><mrow class="- topic/foreign "><mtable class="- topic/foreign " rowspacing="0.2ex" columnspacing="0.4em"><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="right"><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="132">一个</mi></mtd><mtd class="- topic/foreign " columnalign="left"><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="133">一个</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="134">0</mn></mrow></msub><mo class="- topic/foreign ">+</mo><munderover class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign " movablelimits="false" _mstTextHash="793611" _mstHash="135">∑</mo></mrow><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10010" _mstHash="136">n</mi><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="137">1</mn></mrow><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="7098" _mstHash="138">N</mi></mrow></munderover><mrow class="- topic/foreign "><mo class="- topic/foreign ">[</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="139">一个</mi></mrow><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10010" _mstHash="140">n</mi></mrow></msub><mi class="- topic/foreign " _mstTextHash="4106544" _mstHash="141">因为</mi><mi class="- topic/foreign " _mstTextHash="10010" _mstHash="142">n</mi><mi class="- topic/foreign " _mstTextHash="88179" _mstHash="143">ω</mi><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="144">t</mi><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="145">t</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="146">0</mn></mrow></msub><mo class="- topic/foreign ">)</mo></mrow><mo class="- topic/foreign ">+</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="6006" _mstHash="147">B</mi></mrow><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10010" _mstHash="148">n</mi></mrow></msub><mi class="- topic/foreign " _mstTextHash="2968238" _mstHash="149">罪</mi><mi class="- topic/foreign " _mstTextHash="10010" _mstHash="150">n</mi><mi class="- topic/foreign " _mstTextHash="88179" _mstHash="151">ω</mi><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="152">t</mi><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="153">t</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="154">0</mn></mrow></msub><mo class="- topic/foreign ">)</mo></mrow><mo class="- topic/foreign ">]</mo></mrow><mtext class="- topic/foreign " _mstTextHash="1822366" _mstHash="155">为</mtext><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="156">t</mi><mo class="- topic/foreign " _mstTextHash="801255" _mstHash="157">≥</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="158">t</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="159">0</mn></mrow></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="160">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="right"><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="161">一个</mi></mtd><mtd class="- topic/foreign " columnalign="left"><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="162">一个</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="163">0</mn></mrow></msub><mtext class="- topic/foreign " _mstTextHash="1822366" _mstHash="164">为</mtext><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="165">t</mi><mo class="- topic/foreign ">&lt;</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="166">t</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="167">0</mn></mrow></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="168">,</mo></mrow></mtd></mtr></mtable></mrow></math></span></span></span><script type="math/mml" id="MathJax-Element-8"><math class="- topic/foreign " display="block"><mrow class="- topic/foreign "><mtable rowspacing="0.2ex" columnspacing="0.4em" class="- topic/foreign "><mtr class="- topic/foreign "><mtd columnalign="right" class="- topic/foreign "><mi class="- topic/foreign ">a</mi></mtd><mtd columnalign="left" class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">A</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign ">0</mn></mrow></msub><mo class="- topic/foreign ">+</mo><munderover class="- topic/foreign "><mrow class="- topic/foreign "><mo movablelimits="false" class="- topic/foreign ">∑</mo></mrow><mrow class="- topic/foreign "><mi class="- topic/foreign ">n</mi><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign ">1</mn></mrow><mrow class="- topic/foreign "><mi class="- topic/foreign ">N</mi></mrow></munderover><mrow class="- topic/foreign "><mo class="- topic/foreign ">[</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">A</mi></mrow><mrow class="- topic/foreign "><mi class="- topic/foreign ">n</mi></mrow></msub><mi class="- topic/foreign ">cos</mi><mi class="- topic/foreign ">n</mi><mi class="- topic/foreign ">ω</mi><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">t</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign ">0</mn></mrow></msub><mo class="- topic/foreign ">)</mo></mrow><mo class="- topic/foreign ">+</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">B</mi></mrow><mrow class="- topic/foreign "><mi class="- topic/foreign ">n</mi></mrow></msub><mi class="- topic/foreign ">sin</mi><mi class="- topic/foreign ">n</mi><mi class="- topic/foreign ">ω</mi><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">t</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign ">0</mn></mrow></msub><mo class="- topic/foreign ">)</mo></mrow><mo class="- topic/foreign ">]</mo></mrow><mtext class="- topic/foreign "> for </mtext><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">≥</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">t</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign ">0</mn></mrow></msub><mo class="- topic/foreign ">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd columnalign="right" class="- topic/foreign "><mi class="- topic/foreign ">a</mi></mtd><mtd columnalign="left" class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">A</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign ">0</mn></mrow></msub><mtext class="- topic/foreign ">     for </mtext><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">&lt;</mo><msub class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">t</mi></mrow><mrow class="- topic/foreign "><mn class="- topic/foreign ">0</mn></mrow></msub><mo class="- topic/foreign ">,</mo></mrow></mtd></mtr></mtable></mrow></math></script></div>
      <p><font _mstmutation="1" _msttexthash="5859854" _msthash="169">哪里</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-9-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-137" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-138" class="mjx-mrow"><span id="MJXc-Node-139" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-140" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="170">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-141" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="171">0</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="172">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="173">0</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-9"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub></math></script></span><font _mstmutation="1" _msttexthash="13588848" _msthash="174">， <span xmlns="http://www.w3.org/1999/xhtml" class="ph mathterm" _mstmutation="1" _istranslated="1">N</span>，</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-10-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3C9;&lt;/mi&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-142" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-143" class="mjx-mrow"><span id="MJXc-Node-144" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="88179" _msthash="175">ω</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mi class="- topic/foreign " _mstTextHash="88179" _mstHash="176">ω</mi></math></span></span><script type="math/mml" id="MathJax-Element-10"><math class="- topic/foreign "><mi class="- topic/foreign ">ω</mi></math></script></span><font _mstmutation="1" _msttexthash="4004" _msthash="177">,</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-11-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-145" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-146" class="mjx-mrow"><span id="MJXc-Node-147" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-148" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="178">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-149" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="179">0</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="180">一个</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="181">0</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-11"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mn class="- topic/foreign ">0</mn></msub></math></script></span><font _mstmutation="1" _msttexthash="4004" _msthash="182">,</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-12-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;n&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-150" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-151" class="mjx-mrow"><span id="MJXc-Node-152" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-153" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="183">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-154" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="10010" _msthash="184">n</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="185">一个</mi><mi class="- topic/foreign " _mstTextHash="10010" _mstHash="186">n</mi></msub></math></span></span><script type="math/mml" id="MathJax-Element-12"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mi class="- topic/foreign ">n</mi></msub></math></script></span><font _mstmutation="1" _msttexthash="2254980" _msthash="187">,
       和</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-13-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;B&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;n&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-155" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-156" class="mjx-mrow"><span id="MJXc-Node-157" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-158" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em;" _msttexthash="6006" _msthash="188">B</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-159" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="10010" _msthash="189">n</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="6006" _mstHash="190">B</mi><mi class="- topic/foreign " _mstTextHash="10010" _mstHash="191">n</mi></msub></math></span></span><script type="math/mml" id="MathJax-Element-13"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">B</mi><mi class="- topic/foreign ">n</mi></msub></math></script></span><font _mstmutation="1" _msttexthash="4004" _msthash="192">,</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-14-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;n&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;2&lt;/mn&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot; mathvariant=&quot;normal&quot;&gt;&amp;#x2026;&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;N&lt;/mi&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-160" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-161" class="mjx-mrow"><span id="MJXc-Node-162" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-163" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="10010" _msthash="193">n</span></span><span id="MJXc-Node-164" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-165" class="mjx-mrow - topic/foreign  MJXc-space3"><span id="MJXc-Node-166" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="194">1</span></span><span id="MJXc-Node-167" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="195">,</span></span><span id="MJXc-Node-168" class="mjx-mrow - topic/foreign  MJXc-space1"><span id="MJXc-Node-169" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4550" _msthash="196">2</span></span><span id="MJXc-Node-170" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-171" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.312em;" _msttexthash="14352" _msthash="197">...</span></span><span id="MJXc-Node-172" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-173" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em; padding-right: 0.085em;" _msttexthash="7098" _msthash="198">N</span></span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10010" _mstHash="199">n</mi><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="200">1</mn><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="201">,</mo><mrow class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="4550" _mstHash="202">2</mn><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="203">⁢</mo><mi class="- topic/foreign " mathvariant="normal" _mstTextHash="14352" _mstHash="204">...</mi><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="205">⁢</mo><mi class="- topic/foreign " _mstTextHash="7098" _mstHash="206">N</mi></mrow></mrow></mrow></math></span></span><script type="math/mml" id="MathJax-Element-14"><math class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">n</mi><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign ">1</mn><mo class="- topic/foreign ">,</mo><mrow class="- topic/foreign "><mn class="- topic/foreign ">2</mn><mo class="- topic/foreign ">⁢</mo><mi mathvariant="normal" class="- topic/foreign ">…</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">N</mi></mrow></mrow></mrow></math></script></span><font _mstmutation="1" _msttexthash="146381612" _msthash="207">,
       是用户定义的常量。这种输入形式的示例如图 <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-data-periodic__simaprc-c-pamplitude-periodic" _mstmutation="1" _istranslated="1">2</a> 所示。</font></p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="208">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">PERIODIC</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="209">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Periodic</span></pre></div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig" id="simaprc-c-amplitude-data-periodic__simaprc-c-pamplitude-periodic"><span xmlns="" class="figcap" _msttexthash="38487917" _msthash="210">图2.周期幅度定义示例。</span>
        
        <br><img xmlns="" class="image" src="blogpic/pamplitude-periodic-nls.png"><br>
      </div>
      </div>
      </div>
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-data-mod">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="18832073" _msthash="211">定义调制数据</h3>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="66286415" _msthash="212">选择调制定义方法以将振幅 <span xmlns="http://www.w3.org/1999/xhtml" class="ph mathterm" _istranslated="1">a</span> 定义为</p><div class="equation"><span class="MathJax_Preview" style="color: inherit;"></span><span class="mjx-chtml MJXc-display" style="text-align: left; margin-left: 3.333em;"><span id="MathJax-Element-15-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" style="font-size: 135%; position: relative;" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot; display=&quot;block&quot;&gt;&lt;mtable class=&quot;- topic/foreign &quot; rowspacing=&quot;0.2ex&quot; columnspacing=&quot;0.4em&quot;&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;right&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;left&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;sin&lt;/mi&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3C9;&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/msub&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;sin&lt;/mi&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3C9;&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mtext class=&quot;- topic/foreign &quot;&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;for&amp;#xA0;&lt;/mtext&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;gt;&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;right&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;left&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mtext class=&quot;- topic/foreign &quot;&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;for&amp;#xA0;&lt;/mtext&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2264;&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;/mtable&gt;&lt;/math&gt;" role="presentation"><span id="MJXc-Node-174" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-175" class="mjx-mrow"><span id="MJXc-Node-176" class="mjx-mtable - topic/foreign " style="vertical-align: -0.841em; padding: 0px 0.167em;"><span class="mjx-table"><span id="MJXc-Node-177" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-178" class="mjx-mtd - topic/foreign " style="padding: 0px 0.2em 0.044em 0px; text-align: right; width: 0.529em;"><span id="MJXc-Node-179" class="mjx-mrow" style="margin-top: 0.334em; margin-bottom: 0.165em;"><span id="MJXc-Node-180" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="213">一个</span></span></span></span><span id="MJXc-Node-181" class="mjx-mtd - topic/foreign " style="padding: 0px 0px 0.044em 0.2em; text-align: left; width: 21.455em;"><span id="MJXc-Node-182" class="mjx-mrow" style="margin-top: 0.025em;"><span id="MJXc-Node-183" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-184" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-185" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-186" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="214">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-187" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="215">0</span></span></span></span><span id="MJXc-Node-188" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-189" class="mjx-mi - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="216">一个</span></span><span id="MJXc-Node-190" class="mjx-mi - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="2968238" _msthash="217">罪</span></span><span id="MJXc-Node-191" class="mjx-msub - topic/foreign  MJXc-space1"><span class="mjx-base"><span id="MJXc-Node-192" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="88179" _msthash="218">ω</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-193" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="219">1</span></span></span></span><span id="MJXc-Node-194" class="mjx-mrow - topic/foreign  MJXc-space1"><span id="MJXc-Node-195" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-196" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="220">t</span></span><span id="MJXc-Node-197" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="221">−</span></span><span id="MJXc-Node-198" class="mjx-msub - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-199" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="222">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-200" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="223">0</span></span></span></span><span id="MJXc-Node-201" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span><span id="MJXc-Node-202" class="mjx-mi - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="2968238" _msthash="224">罪</span></span><span id="MJXc-Node-203" class="mjx-msub - topic/foreign  MJXc-space1"><span class="mjx-base"><span id="MJXc-Node-204" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="88179" _msthash="225">ω</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-205" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4550" _msthash="226">2</span></span></span></span><span id="MJXc-Node-206" class="mjx-mrow - topic/foreign  MJXc-space1"><span id="MJXc-Node-207" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-208" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="227">t</span></span><span id="MJXc-Node-209" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="228">−</span></span><span id="MJXc-Node-210" class="mjx-msub - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-211" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="229">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-212" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="230">0</span></span></span></span><span id="MJXc-Node-213" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span><span id="MJXc-Node-214" class="mjx-mtext - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.373em;" _msttexthash="1822366" _msthash="231">为</span></span><span id="MJXc-Node-215" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="232">t</span></span><span id="MJXc-Node-216" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.25em; padding-bottom: 0.373em;">&gt;</span></span><span id="MJXc-Node-217" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-218" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="233">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-219" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="234">0</span></span></span></span><span id="MJXc-Node-220" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="235">,</span></span></span></span></span></span><span id="MJXc-Node-221" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-222" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em 0px 0px; text-align: right;"><span id="MJXc-Node-223" class="mjx-mrow" style="margin-top: 0.334em; margin-bottom: 0.165em;"><span id="MJXc-Node-224" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="236">一个</span></span></span></span><span id="MJXc-Node-225" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0px 0px 0.2em; text-align: left;"><span id="MJXc-Node-226" class="mjx-mrow" style="margin-top: 0.059em;"><span id="MJXc-Node-227" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-228" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-229" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-230" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="237">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-231" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="238">0</span></span></span></span><span id="MJXc-Node-232" class="mjx-mtext - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.373em;" _msttexthash="1822366" _msthash="239">为</span></span><span id="MJXc-Node-233" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="240">t</span></span><span id="MJXc-Node-234" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.497em;" _msttexthash="801164" _msthash="241">≤</span></span><span id="MJXc-Node-235" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-236" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="242">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-237" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="243">0</span></span></span></span><span id="MJXc-Node-238" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="244">,</span></span></span></span></span></span></span></span></span></span><span class="MJX_Assistive_MathML MJX_Assistive_MathML_Block" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML" display="block"><mtable class="- topic/foreign " rowspacing="0.2ex" columnspacing="0.4em"><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="right"><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="245">一个</mi></mtd><mtd class="- topic/foreign " columnalign="left"><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="246">一个</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="247">0</mn></msub><mo class="- topic/foreign ">+</mo><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="248">一个</mi><mi class="- topic/foreign " _mstTextHash="2968238" _mstHash="249">罪</mi><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="88179" _mstHash="250">ω</mi><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="251">1</mn></msub><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="252">t</mi><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="253">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="254">0</mn></msub><mo class="- topic/foreign ">)</mo></mrow><mi class="- topic/foreign " _mstTextHash="2968238" _mstHash="255">罪</mi><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="88179" _mstHash="256">ω</mi><mn class="- topic/foreign " _mstTextHash="4550" _mstHash="257">2</mn></msub><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="258">t</mi><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="259">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="260">0</mn></msub><mo class="- topic/foreign ">)</mo></mrow><mtext class="- topic/foreign " _mstTextHash="1822366" _mstHash="261">为</mtext><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="262">t</mi><mo class="- topic/foreign ">&gt;</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="263">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="264">0</mn></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="265">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="right"><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="266">一个</mi></mtd><mtd class="- topic/foreign " columnalign="left"><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="267">一个</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="268">0</mn></msub><mtext class="- topic/foreign " _mstTextHash="1822366" _mstHash="269">为</mtext><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="270">t</mi><mo class="- topic/foreign " _mstTextHash="801164" _mstHash="271">≤</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="272">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="273">0</mn></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="274">,</mo></mrow></mtd></mtr></mtable></math></span></span></span><script type="math/mml" id="MathJax-Element-15"><math class="- topic/foreign " display="block"><mtable rowspacing="0.2ex" columnspacing="0.4em" class="- topic/foreign "><mtr class="- topic/foreign "><mtd columnalign="right" class="- topic/foreign "><mi class="- topic/foreign ">a</mi></mtd><mtd columnalign="left" class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mn class="- topic/foreign ">0</mn></msub><mo class="- topic/foreign ">+</mo><mi class="- topic/foreign ">A</mi><mi class="- topic/foreign ">sin</mi><msub class="- topic/foreign "><mi class="- topic/foreign ">ω</mi><mn class="- topic/foreign ">1</mn></msub><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub><mo class="- topic/foreign ">)</mo></mrow><mi class="- topic/foreign ">sin</mi><msub class="- topic/foreign "><mi class="- topic/foreign ">ω</mi><mn class="- topic/foreign ">2</mn></msub><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub><mo class="- topic/foreign ">)</mo></mrow><mtext class="- topic/foreign ">     for </mtext><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">&gt;</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub><mo class="- topic/foreign ">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd columnalign="right" class="- topic/foreign "><mi class="- topic/foreign ">a</mi></mtd><mtd columnalign="left" class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mn class="- topic/foreign ">0</mn></msub><mtext class="- topic/foreign ">     for </mtext><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">≤</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub><mo class="- topic/foreign ">,</mo></mrow></mtd></mtr></mtable></math></script></div>
      <p><font _mstmutation="1" _msttexthash="5859854" _msthash="275">哪里</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-16-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-239" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-240" class="mjx-mrow"><span id="MJXc-Node-241" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-242" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="276">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-243" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="277">0</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="278">一个</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="279">0</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-16"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mn class="- topic/foreign ">0</mn></msub></math></script></span><font _mstmutation="1" _msttexthash="13587496" _msthash="280">， <span xmlns="http://www.w3.org/1999/xhtml" class="ph mathterm" _mstmutation="1" _istranslated="1">A</span>，</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-17-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-244" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-245" class="mjx-mrow"><span id="MJXc-Node-246" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-247" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="281">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-248" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="282">0</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="283">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="284">0</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-17"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub></math></script></span><font _mstmutation="1" _msttexthash="4004" _msthash="285">,</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-18-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3C9;&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-249" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-250" class="mjx-mrow"><span id="MJXc-Node-251" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-252" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="88179" _msthash="286">ω</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-253" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="287">1</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="88179" _mstHash="288">ω</mi><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="289">1</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-18"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">ω</mi><mn class="- topic/foreign ">1</mn></msub></math></script></span><font _mstmutation="1" _msttexthash="2254980" _msthash="290">,
       和</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-19-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3C9;&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-254" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-255" class="mjx-mrow"><span id="MJXc-Node-256" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-257" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="88179" _msthash="291">ω</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-258" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4550" _msthash="292">2</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="88179" _mstHash="293">ω</mi><mn class="- topic/foreign " _mstTextHash="4550" _mstHash="294">2</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-19"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">ω</mi><mn class="- topic/foreign ">2</mn></msub></math></script></span><font _mstmutation="1" _msttexthash="138595379" _msthash="295">是用户定义的常量。这种输入形式的示例如图 <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-data-mod__simaprc-c-pamplitude-modulated" _mstmutation="1" _istranslated="1">3</a> 所示。</font></p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="296">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">MODULATED</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="297">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Modulated</span></pre></div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig" id="simaprc-c-amplitude-data-mod__simaprc-c-pamplitude-modulated"><span xmlns="" class="figcap" _msttexthash="39573092" _msthash="298">图3.调制幅度定义示例。</span>
        
        <br><img xmlns="" class="image" src="blogpic/pamplitude-modulated-nls.png"><br>
      </div>
      </div>
      </div>
      
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-data-decay">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="18821933" _msthash="299">定义指数衰减</h3>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="99564166" _msthash="300">选择指数衰减定义方法以定义振幅 <span xmlns="http://www.w3.org/1999/xhtml" class="ph mathterm" _istranslated="1">a</span>，作为</p><div class="equation"><span class="MathJax_Preview" style="color: inherit;"></span><span class="mjx-chtml MJXc-display" style="text-align: left; margin-left: 3.333em;"><span id="MathJax-Element-20-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" style="font-size: 135%; position: relative;" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot; display=&quot;block&quot;&gt;&lt;mtable class=&quot;- topic/foreign &quot; rowspacing=&quot;0.2ex&quot; columnspacing=&quot;0.4em&quot;&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;right&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;left&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;exp&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;/&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;d&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mtext class=&quot;- topic/foreign &quot;&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;for&amp;#xA0;&lt;/mtext&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2265;&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;right&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;left&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mtext class=&quot;- topic/foreign &quot;&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;for&amp;#xA0;&lt;/mtext&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;lt;&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;/mtable&gt;&lt;/math&gt;" role="presentation"><span id="MJXc-Node-259" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-260" class="mjx-mrow"><span id="MJXc-Node-261" class="mjx-mtable - topic/foreign " style="vertical-align: -0.841em; padding: 0px 0.167em;"><span class="mjx-table"><span id="MJXc-Node-262" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-263" class="mjx-mtd - topic/foreign " style="padding: 0px 0.2em 0.044em 0px; text-align: right; width: 0.529em;"><span id="MJXc-Node-264" class="mjx-mrow" style="margin-top: 0.334em; margin-bottom: 0.165em;"><span id="MJXc-Node-265" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="301">一个</span></span></span></span><span id="MJXc-Node-266" class="mjx-mtd - topic/foreign " style="padding: 0px 0px 0.044em 0.2em; text-align: left; width: 17.882em;"><span id="MJXc-Node-267" class="mjx-mrow" style="margin-top: 0.025em;"><span id="MJXc-Node-268" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-269" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-270" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-271" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="302">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-272" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="303">0</span></span></span></span><span id="MJXc-Node-273" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-274" class="mjx-mi - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="304">一个</span></span><span id="MJXc-Node-275" class="mjx-mi - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.188em; padding-bottom: 0.559em;" _msttexthash="7068789" _msthash="305">经验</span></span><span id="MJXc-Node-276" class="mjx-mrow - topic/foreign  MJXc-space1"><span id="MJXc-Node-277" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-278" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="306">−</span></span><span id="MJXc-Node-279" class="mjx-mrow - topic/foreign  MJXc-space1"><span id="MJXc-Node-280" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-281" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="307">t</span></span><span id="MJXc-Node-282" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="308">−</span></span><span id="MJXc-Node-283" class="mjx-msub - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-284" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="309">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-285" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="310">0</span></span></span></span><span id="MJXc-Node-286" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span><span id="MJXc-Node-287" class="mjx-mo - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">/</span></span><span id="MJXc-Node-288" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-289" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="311">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.219em; padding-right: 0.071em;"><span id="MJXc-Node-290" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.312em; padding-right: 0.003em;" _msttexthash="9100" _msthash="312">d</span></span></span></span><span id="MJXc-Node-291" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span><span id="MJXc-Node-292" class="mjx-mtext - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.373em;" _msttexthash="1822366" _msthash="313">为</span></span><span id="MJXc-Node-293" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="314">t</span></span><span id="MJXc-Node-294" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.497em;" _msttexthash="801255" _msthash="315">≥</span></span><span id="MJXc-Node-295" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-296" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="316">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-297" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="317">0</span></span></span></span><span id="MJXc-Node-298" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="318">,</span></span></span></span></span></span><span id="MJXc-Node-299" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-300" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em 0px 0px; text-align: right;"><span id="MJXc-Node-301" class="mjx-mrow" style="margin-top: 0.334em; margin-bottom: 0.165em;"><span id="MJXc-Node-302" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="319">一个</span></span></span></span><span id="MJXc-Node-303" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0px 0px 0.2em; text-align: left;"><span id="MJXc-Node-304" class="mjx-mrow" style="margin-top: 0.059em;"><span id="MJXc-Node-305" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-306" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-307" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-308" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="320">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-309" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="321">0</span></span></span></span><span id="MJXc-Node-310" class="mjx-mtext - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.373em;" _msttexthash="1822366" _msthash="322">为</span></span><span id="MJXc-Node-311" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="323">t</span></span><span id="MJXc-Node-312" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.25em; padding-bottom: 0.373em;">&lt;</span></span><span id="MJXc-Node-313" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-314" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="324">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-315" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="325">0</span></span></span></span><span id="MJXc-Node-316" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="326">,</span></span></span></span></span></span></span></span></span></span><span class="MJX_Assistive_MathML MJX_Assistive_MathML_Block" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML" display="block"><mtable class="- topic/foreign " rowspacing="0.2ex" columnspacing="0.4em"><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="right"><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="327">一个</mi></mtd><mtd class="- topic/foreign " columnalign="left"><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="328">一个</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="329">0</mn></msub><mo class="- topic/foreign ">+</mo><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="330">一个</mi><mi class="- topic/foreign " _mstTextHash="7068789" _mstHash="331">经验</mi><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mo class="- topic/foreign ">-</mo><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mi class="- topic/foreign " 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_mstTextHash="4004" _mstHash="342">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="right"><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="343">一个</mi></mtd><mtd class="- topic/foreign " columnalign="left"><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="344">一个</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="345">0</mn></msub><mtext class="- topic/foreign " _mstTextHash="1822366" _mstHash="346">为</mtext><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="347">t</mi><mo class="- topic/foreign ">&lt;</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="348">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="349">0</mn></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="350">,</mo></mrow></mtd></mtr></mtable></math></span></span></span><script type="math/mml" id="MathJax-Element-20"><math class="- topic/foreign " display="block"><mtable rowspacing="0.2ex" columnspacing="0.4em" class="- topic/foreign "><mtr class="- topic/foreign "><mtd columnalign="right" class="- topic/foreign "><mi class="- topic/foreign ">a</mi></mtd><mtd columnalign="left" class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mn class="- topic/foreign ">0</mn></msub><mo class="- topic/foreign ">+</mo><mi class="- topic/foreign ">A</mi><mi class="- topic/foreign ">exp</mi><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mo class="- topic/foreign ">-</mo><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mi class="- topic/foreign 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      <p><font _mstmutation="1" _msttexthash="5859854" _msthash="351">哪里</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-21-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-317" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-318" class="mjx-mrow"><span id="MJXc-Node-319" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-320" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="352">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-321" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="353">0</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="354">一个</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="355">0</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-21"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mn class="- topic/foreign ">0</mn></msub></math></script></span><font _mstmutation="1" _msttexthash="13587496" _msthash="356">， <span xmlns="http://www.w3.org/1999/xhtml" class="ph mathterm" _mstmutation="1" _istranslated="1">A</span>，</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-22-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-322" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-323" class="mjx-mrow"><span id="MJXc-Node-324" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-325" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="357">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-326" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="358">0</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="359">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="360">0</mn></msub></math></span></span><script type="math/mml" id="MathJax-Element-22"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub></math></script></span><font _mstmutation="1" _msttexthash="2254980" _msthash="361">,
       和</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-23-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;d&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-327" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-328" class="mjx-mrow"><span id="MJXc-Node-329" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-330" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="362">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.219em; padding-right: 0.071em;"><span id="MJXc-Node-331" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.312em; padding-right: 0.003em;" _msttexthash="9100" _msthash="363">d</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="364">t</mi><mi class="- topic/foreign " _mstTextHash="9100" _mstHash="365">d</mi></msub></math></span></span><script type="math/mml" id="MathJax-Element-23"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mi class="- topic/foreign ">d</mi></msub></math></script></span><font _mstmutation="1" _msttexthash="138595730" _msthash="366">是用户定义的常量。这种输入形式的示例如图 <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-data-decay__simaprc-c-pamplitude-decay" _mstmutation="1" _istranslated="1">4</a> 所示。</font></p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="367">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">DECAY</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="368">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Decay</span></pre></div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig" id="simaprc-c-amplitude-data-decay__simaprc-c-pamplitude-decay"><span xmlns="" class="figcap" _msttexthash="51945283" _msthash="369">图4.指数衰减幅度定义示例。</span>
        
        <br><img xmlns="" class="image" src="blogpic/pamplitude-decay-nls.png"><br>
      </div>
      </div>
      </div>
      
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-data-smooth">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="29658122" _msthash="370">定义平滑步长数据</h3>
      <div xmlns="" class="body conbody sma-topic-body">
      <p><font _mstmutation="1" _msttexthash="816417654" _msthash="371"><span xmlns="http://www.w3.org/1999/xhtml" class="ph" _mstmutation="1" _istranslated="1">Abaqus/Standard</span> 和 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _mstmutation="1" _istranslated="1">Abaqus/Explicit</span> 可以根据平滑步长数据计算振幅。选择平滑步骤
       定义定义两个之间的振幅 <span xmlns="http://www.w3.org/1999/xhtml" class="ph mathterm" _mstmutation="1" _istranslated="1">a</span> 的方法
       连续数据点</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-24-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-332" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-333" class="mjx-mrow"><span id="MJXc-Node-334" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-335" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-336" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-337" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-338" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="372">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-339" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="373">我</span></span></span></span><span id="MJXc-Node-340" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="374">,</span></span><span id="MJXc-Node-341" class="mjx-msub - topic/foreign  MJXc-space1"><span class="mjx-base"><span id="MJXc-Node-342" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="375">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-343" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="376">我</span></span></span></span></span><span id="MJXc-Node-344" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="377">t</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="378">我</mi></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="379">,</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="380">一个</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="381">我</mi></msub></mrow><mo class="- topic/foreign ">)</mo></mrow></math></span></span><script type="math/mml" id="MathJax-Element-24"><math class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mi class="- topic/foreign ">i</mi></msub><mo class="- topic/foreign ">,</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mi class="- topic/foreign ">i</mi></msub></mrow><mo class="- topic/foreign ">)</mo></mrow></math></script></span><font _mstmutation="1" _msttexthash="1969604" _msthash="382">和</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-25-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-345" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-346" class="mjx-mrow"><span id="MJXc-Node-347" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-348" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-349" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-350" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-351" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="383">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-352" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-353" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="384">我</span></span><span id="MJXc-Node-354" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-355" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="385">1</span></span></span></span></span><span id="MJXc-Node-356" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="386">,</span></span><span id="MJXc-Node-357" class="mjx-msub - topic/foreign  MJXc-space1"><span class="mjx-base"><span id="MJXc-Node-358" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="387">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-359" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-360" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="388">我</span></span><span id="MJXc-Node-361" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-362" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="389">1</span></span></span></span></span></span><span id="MJXc-Node-363" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="390">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="391">我</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="392">1</mn></mrow></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="393">,</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="394">一个</mi><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="395">我</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="396">1</mn></mrow></msub></mrow><mo class="- topic/foreign ">)</mo></mrow></math></span></span><script type="math/mml" id="MathJax-Element-25"><math class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign ">i</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign ">1</mn></mrow></msub><mo class="- topic/foreign ">,</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mrow class="- topic/foreign "><mi class="- topic/foreign ">i</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign ">1</mn></mrow></msub></mrow><mo class="- topic/foreign ">)</mo></mrow></math></script></span><font _mstmutation="1" _msttexthash="2085174" _msthash="397">如</font></p><div class="equation"><span class="MathJax_Preview" style="color: inherit;"></span><span class="mjx-chtml MJXc-display" style="text-align: left; margin-left: 3.333em;"><span id="MathJax-Element-26-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" style="font-size: 135%; position: relative;" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot; display=&quot;block&quot;&gt;&lt;mtable class=&quot;- topic/foreign &quot; rowspacing=&quot;0.2ex&quot; columnspacing=&quot;0.4em&quot;&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;right&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;left&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot; mathvariant=&quot;italic&quot; separator=&quot;true&quot;&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;/mo&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mo class=&quot;- topic/foreign &quot; mathvariant=&quot;italic&quot; separator=&quot;true&quot;&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;msup class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3BE;&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;3&lt;/mn&gt;&lt;/msup&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;10&lt;/mn&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;15&lt;/mn&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3BE;&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;6&lt;/mn&gt;&lt;msup class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3BE;&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;2&lt;/mn&gt;&lt;/msup&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mtext class=&quot;- topic/foreign &quot;&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;for&amp;#xA0;&lt;/mtext&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2264;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2264;&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;/mtable&gt;&lt;/math&gt;" role="presentation"><span id="MJXc-Node-364" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-365" class="mjx-mrow"><span id="MJXc-Node-366" class="mjx-mtable - topic/foreign " style="vertical-align: -0.375em; padding: 0px 0.167em;"><span class="mjx-table"><span id="MJXc-Node-367" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-368" class="mjx-mtd - topic/foreign " style="padding: 0px 0.2em 0px 0px; text-align: right; width: 0.529em;"><span id="MJXc-Node-369" class="mjx-mrow" style="margin-top: 0.334em; margin-bottom: 0.165em;"><span id="MJXc-Node-370" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="398">一个</span></span></span></span><span id="MJXc-Node-371" class="mjx-mtd - topic/foreign " style="padding: 0px 0px 0px 0.2em; text-align: left; width: 27.196em;"><span id="MJXc-Node-372" class="mjx-mrow"><span id="MJXc-Node-373" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-374" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-375" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-376" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="399">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-377" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="400">我</span></span></span></span><span id="MJXc-Node-378" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="margin-top: -0.244em; padding-bottom: 0.25em;">&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span id="MJXc-Node-379" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-380" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-math-I" style="margin-top: -0.244em; padding-bottom: 0.25em;">&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span id="MJXc-Node-381" class="mjx-mrow - topic/foreign  MJXc-space1"><span id="MJXc-Node-382" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-383" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-384" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="401">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-385" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-386" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="402">我</span></span><span id="MJXc-Node-387" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-388" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="403">1</span></span></span></span></span><span id="MJXc-Node-389" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="404">−</span></span><span id="MJXc-Node-390" class="mjx-msub - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-391" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="405">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-392" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="406">我</span></span></span></span><span id="MJXc-Node-393" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span><span id="MJXc-Node-394" class="mjx-msup - topic/foreign  MJXc-space1"><span class="mjx-base" style="margin-right: -0.005em;"><span id="MJXc-Node-395" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.497em; padding-right: 0.005em;" _msttexthash="87178" _msthash="407">ξ</span></span></span><span class="mjx-sup" style="font-size: 70.7%; vertical-align: 0.513em; padding-left: 0.08em; padding-right: 0.071em;"><span id="MJXc-Node-396" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4641" _msthash="408">3</span></span></span></span><span id="MJXc-Node-397" class="mjx-mrow - topic/foreign  MJXc-space1"><span id="MJXc-Node-398" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-size1-R" style="padding-top: 0.62em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-399" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="9451" _msthash="409">10</span></span><span id="MJXc-Node-400" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="410">−</span></span><span id="MJXc-Node-401" class="mjx-mn - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="9971" _msthash="411">15</span></span><span id="MJXc-Node-402" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.497em; padding-right: 0.005em;" _msttexthash="87178" _msthash="412">ξ</span></span><span id="MJXc-Node-403" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-404" class="mjx-mn - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4914" _msthash="413">6</span></span><span id="MJXc-Node-405" class="mjx-msup - topic/foreign "><span class="mjx-base" style="margin-right: -0.005em;"><span id="MJXc-Node-406" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.497em; padding-right: 0.005em;" _msttexthash="87178" _msthash="414">ξ</span></span></span><span class="mjx-sup" style="font-size: 70.7%; vertical-align: 0.513em; padding-left: 0.08em; padding-right: 0.071em;"><span id="MJXc-Node-407" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4550" _msthash="415">2</span></span></span></span><span id="MJXc-Node-408" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-size1-R" style="padding-top: 0.62em; padding-bottom: 0.62em;">)</span></span></span><span id="MJXc-Node-409" class="mjx-mtext - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.373em;" _msttexthash="1822366" _msthash="416">为</span></span><span id="MJXc-Node-410" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-411" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="417">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-412" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="418">我</span></span></span></span><span id="MJXc-Node-413" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.497em;" _msttexthash="801164" _msthash="419">≤</span></span><span id="MJXc-Node-414" class="mjx-mi - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="420">t</span></span><span id="MJXc-Node-415" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.497em;" _msttexthash="801164" _msthash="421">≤</span></span><span id="MJXc-Node-416" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-417" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="422">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-418" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-419" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="423">我</span></span><span id="MJXc-Node-420" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-421" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="424">1</span></span></span></span></span><span id="MJXc-Node-422" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="425">,</span></span></span></span></span></span></span></span></span></span><span class="MJX_Assistive_MathML MJX_Assistive_MathML_Block" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML" display="block"><mtable class="- topic/foreign " rowspacing="0.2ex" columnspacing="0.4em"><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="right"><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="426">一个</mi></mtd><mtd class="- topic/foreign " columnalign="left"><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="427">一个</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="428">我</mi></msub><mo class="- topic/foreign " mathvariant="italic" separator="true">&nbsp;&nbsp;&nbsp;&nbsp;</mo><mo class="- topic/foreign ">+</mo><mo class="- topic/foreign " mathvariant="italic" separator="true">&nbsp;&nbsp;&nbsp;&nbsp;</mo><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="429">一个</mi><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="430">我</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="431">1</mn></mrow></msub><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="432">一个</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="433">我</mi></msub><mo class="- topic/foreign ">)</mo></mrow><msup class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="87178" _mstHash="434">ξ</mi><mn class="- topic/foreign " _mstTextHash="4641" _mstHash="435">3</mn></msup><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mn class="- topic/foreign " _mstTextHash="9451" _mstHash="436">10</mn><mo class="- topic/foreign ">-</mo><mn class="- topic/foreign " _mstTextHash="9971" _mstHash="437">15</mn><mi class="- topic/foreign " _mstTextHash="87178" _mstHash="438">ξ</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign " _mstTextHash="4914" _mstHash="439">6</mn><msup class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="87178" _mstHash="440">ξ</mi><mn class="- topic/foreign " _mstTextHash="4550" _mstHash="441">2</mn></msup><mo class="- topic/foreign ">)</mo></mrow><mtext class="- topic/foreign " _mstTextHash="1822366" _mstHash="442">为</mtext><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="443">t</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="444">我</mi></msub><mo class="- topic/foreign " _mstTextHash="801164" _mstHash="445">≤</mo><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="446">t</mi><mo class="- topic/foreign " _mstTextHash="801164" _mstHash="447">≤</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="448">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="449">我</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="450">1</mn></mrow></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="451">,</mo></mrow></mtd></mtr></mtable></math></span></span></span><script type="math/mml" id="MathJax-Element-26"><math class="- topic/foreign " display="block"><mtable rowspacing="0.2ex" columnspacing="0.4em" class="- topic/foreign "><mtr class="- topic/foreign "><mtd columnalign="right" class="- topic/foreign "><mi class="- topic/foreign ">a</mi></mtd><mtd columnalign="left" class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mi class="- topic/foreign ">i</mi></msub><mo mathvariant="italic" separator="true" class="- topic/foreign ">    </mo><mo class="- topic/foreign ">+</mo><mo mathvariant="italic" separator="true" class="- topic/foreign ">    </mo><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mrow class="- topic/foreign "><mi class="- topic/foreign ">i</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign ">1</mn></mrow></msub><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mi class="- topic/foreign ">i</mi></msub><mo class="- topic/foreign ">)</mo></mrow><msup class="- topic/foreign "><mi class="- topic/foreign ">ξ</mi><mn class="- topic/foreign ">3</mn></msup><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mn class="- topic/foreign ">10</mn><mo class="- topic/foreign ">-</mo><mn class="- topic/foreign ">15</mn><mi class="- topic/foreign ">ξ</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign ">6</mn><msup class="- topic/foreign "><mi class="- topic/foreign ">ξ</mi><mn class="- topic/foreign ">2</mn></msup><mo class="- topic/foreign ">)</mo></mrow><mtext class="- topic/foreign ">     for </mtext><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mi class="- topic/foreign ">i</mi></msub><mo class="- topic/foreign ">≤</mo><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">≤</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign ">i</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign ">1</mn></mrow></msub><mo class="- topic/foreign ">,</mo></mrow></mtd></mtr></mtable></math></script></div>
      <p><font _mstmutation="1" _msttexthash="5859854" _msthash="452">哪里</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-27-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3BE;&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;/&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-423" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-424" class="mjx-mrow"><span id="MJXc-Node-425" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-426" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.497em; padding-right: 0.005em;" _msttexthash="87178" _msthash="453">ξ</span></span><span id="MJXc-Node-427" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-428" class="mjx-mrow - topic/foreign  MJXc-space3"><span id="MJXc-Node-429" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-430" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-431" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-432" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="454">t</span></span><span id="MJXc-Node-433" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="455">−</span></span><span id="MJXc-Node-434" class="mjx-msub - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-435" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="456">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-436" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="457">我</span></span></span></span></span><span id="MJXc-Node-437" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span><span id="MJXc-Node-438" class="mjx-mo - topic/foreign  MJXc-space1"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">/</span></span><span id="MJXc-Node-439" class="mjx-mrow - topic/foreign  MJXc-space1"><span id="MJXc-Node-440" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-441" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-442" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-443" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="458">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-444" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-445" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="459">我</span></span><span id="MJXc-Node-446" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-447" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="460">1</span></span></span></span></span><span id="MJXc-Node-448" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="461">−</span></span><span id="MJXc-Node-449" class="mjx-msub - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-450" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="462">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-451" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="463">我</span></span></span></span></span><span id="MJXc-Node-452" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="87178" _mstHash="464">ξ</mi><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="465">t</mi><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="466">t</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="467">我</mi></msub></mrow><mo class="- topic/foreign ">)</mo></mrow><mo class="- topic/foreign ">/</mo><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="468">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="469">我</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="470">1</mn></mrow></msub><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="471">t</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="472">我</mi></msub></mrow><mo class="- topic/foreign ">)</mo></mrow></mrow></mrow></math></span></span><script type="math/mml" id="MathJax-Element-27"><math class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">ξ</mi><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mi class="- topic/foreign ">i</mi></msub></mrow><mo class="- topic/foreign ">)</mo></mrow><mo class="- topic/foreign ">/</mo><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign ">i</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign ">1</mn></mrow></msub><mo class="- topic/foreign ">-</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mi class="- topic/foreign ">i</mi></msub></mrow><mo class="- topic/foreign ">)</mo></mrow></mrow></mrow></math></script></span><font _mstmutation="1" _msttexthash="34940854" _msthash="473">.
       上述功能是这样的</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-28-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-453" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-454" class="mjx-mrow"><span id="MJXc-Node-455" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-456" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="474">一个</span></span><span id="MJXc-Node-457" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-458" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-459" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="475">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-460" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="476">我</span></span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="477">一个</mi><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="478">一个</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="479">我</mi></msub></mrow></math></span></span><script type="math/mml" id="MathJax-Element-28"><math class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">a</mi><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mi class="- topic/foreign ">i</mi></msub></mrow></math></script></span><font _mstmutation="1" _msttexthash="2030392" _msthash="480">在</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-29-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-461" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-462" class="mjx-mrow"><span id="MJXc-Node-463" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-464" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="481">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-465" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="482">我</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="483">t</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="484">我</mi></msub></math></span></span><script type="math/mml" id="MathJax-Element-29"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mi class="- topic/foreign ">i</mi></msub></math></script></span><font _mstmutation="1" _msttexthash="4004" _msthash="485">,</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-30-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-466" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-467" class="mjx-mrow"><span id="MJXc-Node-468" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-469" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="486">一个</span></span><span id="MJXc-Node-470" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-471" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-472" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="487">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-473" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-474" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="488">我</span></span><span id="MJXc-Node-475" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-476" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="489">1</span></span></span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="490">一个</mi><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="491">一个</mi><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="492">我</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="493">1</mn></mrow></msub></mrow></math></span></span><script type="math/mml" id="MathJax-Element-30"><math class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">a</mi><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mrow class="- topic/foreign "><mi class="- topic/foreign ">i</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign ">1</mn></mrow></msub></mrow></math></script></span><font _mstmutation="1" _msttexthash="2030392" _msthash="494">在</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-31-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-477" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-478" class="mjx-mrow"><span id="MJXc-Node-479" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-480" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="495">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-481" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-482" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="496">我</span></span><span id="MJXc-Node-483" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-484" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="497">1</span></span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="498">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="499">我</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="500">1</mn></mrow></msub></math></span></span><script type="math/mml" id="MathJax-Element-31"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign ">i</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign ">1</mn></mrow></msub></math></script></span><font _mstmutation="1" _msttexthash="40352806" _msthash="501">,
       A <span xmlns="http://www.w3.org/1999/xhtml" class="ph mathterm" _mstmutation="1" _istranslated="1">的一阶</span>和二阶导数在</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-32-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-485" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-486" class="mjx-mrow"><span id="MJXc-Node-487" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-488" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="502">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-489" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="503">我</span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="504">t</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="505">我</mi></msub></math></span></span><script type="math/mml" id="MathJax-Element-32"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mi class="- topic/foreign ">i</mi></msub></math></script></span><font _mstmutation="1" _msttexthash="1969604" _msthash="506">和</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-33-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-490" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-491" class="mjx-mrow"><span id="MJXc-Node-492" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-493" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="507">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-494" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-495" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="508">我</span></span><span id="MJXc-Node-496" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-497" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="509">1</span></span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="510">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="511">我</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="512">1</mn></mrow></msub></math></span></span><script type="math/mml" id="MathJax-Element-33"><math class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign ">i</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign ">1</mn></mrow></msub></math></script></span><font _mstmutation="1" _msttexthash="167164517" _msthash="513">.
       该定义旨在从一个振幅平滑地上升或下降
       对另一个人的价值。</font></p>
      <p _msttexthash="35499022" _msthash="514">振幅 <span xmlns="http://www.w3.org/1999/xhtml" class="ph mathterm" _istranslated="1">a</span> 的定义如下：</p><div class="equation"><span class="MathJax_Preview" style="color: inherit;"></span><span class="mjx-chtml MJXc-display" style="text-align: left; margin-left: 3.333em;"><span id="MathJax-Element-34-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" style="font-size: 135%; position: relative;" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot; display=&quot;block&quot;&gt;&lt;mtable class=&quot;- topic/foreign &quot; rowspacing=&quot;0.2ex&quot; columnspacing=&quot;0.4em&quot;&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;right&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;left&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mtext class=&quot;- topic/foreign &quot;&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;for&amp;#xA0;&lt;/mtext&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2264;&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;right&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;left&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;f&lt;/mi&gt;&lt;/msub&gt;&lt;mtext class=&quot;- topic/foreign &quot;&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;for&amp;#xA0;&lt;/mtext&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2265;&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;f&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;/mtable&gt;&lt;/math&gt;" role="presentation"><span id="MJXc-Node-498" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-499" class="mjx-mrow"><span id="MJXc-Node-500" class="mjx-mtable - topic/foreign " style="vertical-align: -0.866em; padding: 0px 0.167em;"><span class="mjx-table"><span id="MJXc-Node-501" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-502" class="mjx-mtd - topic/foreign " style="padding: 0px 0.2em 0.044em 0px; text-align: right; width: 0.529em;"><span id="MJXc-Node-503" class="mjx-mrow" style="margin-top: 0.334em; margin-bottom: 0.165em;"><span id="MJXc-Node-504" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="515">一个</span></span></span></span><span id="MJXc-Node-505" class="mjx-mtd - topic/foreign " style="padding: 0px 0px 0.044em 0.2em; text-align: left; width: 7.686em;"><span id="MJXc-Node-506" class="mjx-mrow" style="margin-top: 0.059em;"><span id="MJXc-Node-507" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-508" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-509" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-510" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="516">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-511" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="517">0</span></span></span></span><span id="MJXc-Node-512" class="mjx-mtext - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.373em;" _msttexthash="1822366" _msthash="518">为</span></span><span id="MJXc-Node-513" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="519">t</span></span><span id="MJXc-Node-514" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.497em;" _msttexthash="801164" _msthash="520">≤</span></span><span id="MJXc-Node-515" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-516" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="521">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-517" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="522">0</span></span></span></span><span id="MJXc-Node-518" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="523">,</span></span></span></span></span></span><span id="MJXc-Node-519" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-520" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em 0px 0px; text-align: right;"><span id="MJXc-Node-521" class="mjx-mrow" style="margin-top: 0.334em; margin-bottom: 0.165em;"><span id="MJXc-Node-522" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="524">一个</span></span></span></span><span id="MJXc-Node-523" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0px 0px 0.2em; text-align: left;"><span id="MJXc-Node-524" class="mjx-mrow" style="margin-top: 0.059em;"><span id="MJXc-Node-525" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-526" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-527" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-528" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="525">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.23em; padding-right: 0.071em;"><span id="MJXc-Node-529" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.497em; padding-right: 0.06em;" _msttexthash="9282" _msthash="526">f</span></span></span></span><span id="MJXc-Node-530" class="mjx-mtext - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.373em;" _msttexthash="1822366" _msthash="527">为</span></span><span id="MJXc-Node-531" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="528">t</span></span><span id="MJXc-Node-532" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.497em;" _msttexthash="801255" _msthash="529">≥</span></span><span id="MJXc-Node-533" class="mjx-msub - topic/foreign  MJXc-space3"><span class="mjx-base"><span id="MJXc-Node-534" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="530">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.23em; padding-right: 0.071em;"><span id="MJXc-Node-535" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.497em; padding-right: 0.06em;" _msttexthash="9282" _msthash="531">f</span></span></span></span><span id="MJXc-Node-536" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="532">,</span></span></span></span></span></span></span></span></span></span><span class="MJX_Assistive_MathML MJX_Assistive_MathML_Block" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML" display="block"><mtable class="- topic/foreign " rowspacing="0.2ex" columnspacing="0.4em"><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="right"><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="533">一个</mi></mtd><mtd class="- topic/foreign " columnalign="left"><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="534">一个</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="535">0</mn></msub><mtext class="- topic/foreign " _mstTextHash="1822366" _mstHash="536">为</mtext><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="537">t</mi><mo class="- topic/foreign " _mstTextHash="801164" _mstHash="538">≤</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="539">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="540">0</mn></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="541">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="right"><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="542">一个</mi></mtd><mtd class="- topic/foreign " columnalign="left"><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="543">一个</mi><mi class="- topic/foreign " _mstTextHash="9282" _mstHash="544">f</mi></msub><mtext class="- topic/foreign " _mstTextHash="1822366" _mstHash="545">为</mtext><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="546">t</mi><mo class="- topic/foreign " _mstTextHash="801255" _mstHash="547">≥</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="548">t</mi><mi class="- topic/foreign " _mstTextHash="9282" _mstHash="549">f</mi></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="550">,</mo></mrow></mtd></mtr></mtable></math></span></span></span><script type="math/mml" id="MathJax-Element-34"><math class="- topic/foreign " display="block"><mtable rowspacing="0.2ex" columnspacing="0.4em" class="- topic/foreign "><mtr class="- topic/foreign "><mtd columnalign="right" class="- topic/foreign "><mi class="- topic/foreign ">a</mi></mtd><mtd columnalign="left" class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mn class="- topic/foreign ">0</mn></msub><mtext class="- topic/foreign ">     for </mtext><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">≤</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub><mo class="- topic/foreign ">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd columnalign="right" class="- topic/foreign "><mi class="- topic/foreign ">a</mi></mtd><mtd columnalign="left" class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">=</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mi class="- topic/foreign ">f</mi></msub><mtext class="- topic/foreign ">     for </mtext><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">≥</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mi class="- topic/foreign ">f</mi></msub><mo class="- topic/foreign ">,</mo></mrow></mtd></mtr></mtable></math></script></div>
      <p><font _mstmutation="1" _msttexthash="5859854" _msthash="551">哪里</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-35-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0&lt;/mn&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-537" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-538" class="mjx-mrow"><span id="MJXc-Node-539" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-540" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-541" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-542" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-543" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="552">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-544" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="553">0</span></span></span></span><span id="MJXc-Node-545" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="554">,</span></span><span id="MJXc-Node-546" class="mjx-msub - topic/foreign  MJXc-space1"><span class="mjx-base"><span id="MJXc-Node-547" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="555">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-548" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4368" _msthash="556">0</span></span></span></span></span><span id="MJXc-Node-549" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="557">t</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="558">0</mn></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="559">,</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="560">一个</mi><mn class="- topic/foreign " _mstTextHash="4368" _mstHash="561">0</mn></msub></mrow><mo class="- topic/foreign ">)</mo></mrow></math></span></span><script type="math/mml" id="MathJax-Element-35"><math class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mn class="- topic/foreign ">0</mn></msub><mo class="- topic/foreign ">,</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mn class="- topic/foreign ">0</mn></msub></mrow><mo class="- topic/foreign ">)</mo></mrow></math></script></span><font _mstmutation="1" _msttexthash="1969604" _msthash="562">和</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-36-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;f&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;f&lt;/mi&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-550" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-551" class="mjx-mrow"><span id="MJXc-Node-552" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-553" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-size1-R" style="padding-top: 0.62em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-554" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-555" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-556" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="563">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.23em; padding-right: 0.071em;"><span id="MJXc-Node-557" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.497em; padding-right: 0.06em;" _msttexthash="9282" _msthash="564">f</span></span></span></span><span id="MJXc-Node-558" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="565">,</span></span><span id="MJXc-Node-559" class="mjx-msub - topic/foreign  MJXc-space1"><span class="mjx-base"><span id="MJXc-Node-560" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="566">一个</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.23em; padding-right: 0.071em;"><span id="MJXc-Node-561" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.497em; padding-right: 0.06em;" _msttexthash="9282" _msthash="567">f</span></span></span></span></span><span id="MJXc-Node-562" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-size1-R" style="padding-top: 0.62em; padding-bottom: 0.62em;">)</span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="568">t</mi><mi class="- topic/foreign " _mstTextHash="9282" _mstHash="569">f</mi></msub><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="570">,</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="571">一个</mi><mi class="- topic/foreign " _mstTextHash="9282" _mstHash="572">f</mi></msub></mrow><mo class="- topic/foreign ">)</mo></mrow></math></span></span><script type="math/mml" id="MathJax-Element-36"><math class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mi class="- topic/foreign ">f</mi></msub><mo class="- topic/foreign ">,</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mi class="- topic/foreign ">f</mi></msub></mrow><mo class="- topic/foreign ">)</mo></mrow></math></script></span><font _mstmutation="1" _msttexthash="61685221" _msthash="573">分别是第一个和最后一个数据点。</font></p>
      <p _msttexthash="596698232" _msthash="574">这种输入形式的示例如图 <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-data-smooth__simaprc-c-pamp-smooth-step1" _istranslated="1">5</a> 和<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-data-smooth__simaprc-c-pamp-smooth-step2" _istranslated="1">图 6</a> 所示。
       此定义不能用于在一组数据之间平滑插值
       点;即，此定义不能用于进行曲线拟合。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="575">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">SMOOTH STEP</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="576">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Smooth step</span></pre></div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig" id="simaprc-c-amplitude-data-smooth__simaprc-c-pamp-smooth-step1"><span xmlns="" class="figcap" _msttexthash="117768131" _msthash="577">图5.具有两个数据点的平滑步长幅度定义示例。</span>
        
        <br><img xmlns="" class="image" src="blogpic/pamp-smooth-step1-nls.png"><br>
      </div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig" id="simaprc-c-amplitude-data-smooth__simaprc-c-pamp-smooth-step2"><span xmlns="" class="figcap" _msttexthash="118162343" _msthash="578">图6.具有多个数据的平滑步进幅度定义示例
       点。</span>
        
        <br><img xmlns="" class="image" src="blogpic/pamp-smooth-step2-nls.png"><br>
      </div>
      </div>
      </div>
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-data-sol">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="77319567" _msthash="579">定义超塑性成形的溶液相关振幅
       分析</h3>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="4725569901" _msthash="580"><span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/Standard可以根据</span>解因变量计算振幅值。选择
       用于创建解决方案相关定义方法
       振幅曲线。数据由初始值、最小值和
       最大值。振幅从初始值开始，然后修改
       根据解决方案的进度，受最小值和最大值的限制
       值。最大值通常是用于结束的控制机制
       分析。该方法与蠕变应变率控制一起使用
       超塑性形成分析（见<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEMATRefMap/simamat-c-ratedepcreep.htm" _istranslated="1">速率依赖性塑性：蠕变和膨胀</a>）。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="581">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">SOLUTION DEPENDENT</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="582">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Solution dependent</span></pre></div>
      </div>
      </div>
      
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-data-bub">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="61040512" _msthash="583">定义水下爆炸的气泡载荷幅度</h3>
      
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="3358072822" _msthash="584"><span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus</span> 中有两个接口可用于应用入射波负载（请参阅<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-acoustic.htm#simaprc-c-acoustic-incidentwave" _istranslated="1">外部源引起的入射波负载</a>）。
       对于任一界面，气泡动力学都可以使用<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus</span>内部模型来描述。
       此内置机械模型的描述以及定义
       气泡行为在<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-acoustic.htm#simaprc-c-acoustic-incidentwave-describe__simaprc-c-acoustic-bubble" _istranslated="1">定义球形入射波载荷的气泡载荷</a>中进行了讨论。
       相关的理论细节在<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAETHERefMap/simathe-c-undexloads.htm" title="Abaqus provides a capability for introducing generalized forces on acoustic and solid media associated with the arrival of dilatational waves." _istranslated="1">入射膨胀波场引起的载荷</a>中描述。</p>
      <p _msttexthash="1528849088" _msthash="585">水下入射波加载的首选接口
       爆炸使用 <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqupper-nochk" _istranslated="1">UNDEX</span> 电荷属性定义指定气泡动力学（请参见<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-acoustic.htm#simaprc-c-acoustic-incidentwave-describe__simaprc-c-acoustic-bubble" _istranslated="1">定义球形入射波载荷的气泡载荷</a>）。
       入射波加载的替代接口使用气泡定义
       在本节中描述以定义气泡负载幅度曲线。</p>
      <p _msttexthash="122558631" _msthash="586">具有以下输入数据的气泡振幅定义示例
       如图 <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-data-bub__simaprc-c-pamp-bubble-load" _istranslated="1">7</a> 所示。</p><div class="equation"><span class="MathJax_Preview" style="color: inherit;"></span><span class="mjx-chtml MJXc-display" style="text-align: left; margin-left: 3.333em;"><span id="MathJax-Element-37-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" style="font-size: 135%; position: relative;" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot; display=&quot;block&quot;&gt;&lt;mtable class=&quot;- topic/foreign &quot; rowspacing=&quot;0.2ex&quot; columnspacing=&quot;0.4em&quot;&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;K&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;5.21&lt;/mn&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#xD7;&lt;/mo&gt;&lt;msup class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;10&lt;/mn&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;7&lt;/mn&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;k&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;9.0&lt;/mn&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#xD7;&lt;/mo&gt;&lt;msup class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;10&lt;/mn&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0.18&lt;/mn&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;B&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0.185&lt;/mn&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;K&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;c&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;8.396&lt;/mn&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#xD7;&lt;/mo&gt;&lt;msup class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;10&lt;/mn&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;8&lt;/mn&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3B3;&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1.27&lt;/mn&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3C1;&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;c&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1.5&lt;/mn&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#xD7;&lt;/mo&gt;&lt;msup class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;10&lt;/mn&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;3&lt;/mn&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;m&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;c&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;226.8&lt;/mn&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;d&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;I&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;137.16&lt;/mn&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&amp;#x3C1;&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;f&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1.0&lt;/mn&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#xD7;&lt;/mo&gt;&lt;msup class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;10&lt;/mn&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;3&lt;/mn&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;c&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;f&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1.5&lt;/mn&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#xD7;&lt;/mo&gt;&lt;msup class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;10&lt;/mn&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;3&lt;/mn&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot; mathvariant=&quot;bold&quot;&gt;n&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;X&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0.0&lt;/mn&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot; mathvariant=&quot;bold&quot;&gt;n&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;Y&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0.0&lt;/mn&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot; mathvariant=&quot;bold&quot;&gt;n&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;Z&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1.0&lt;/mn&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;g&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;9.8&lt;/mn&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;p&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;m&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;9.8&lt;/mn&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#xD7;&lt;/mo&gt;&lt;msup class=&quot;- topic/foreign &quot;&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;10&lt;/mn&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;4&lt;/mn&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;,&lt;/mo&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;/mtr&gt;&lt;mtr class=&quot;- topic/foreign &quot;&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;T&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;f&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;n&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;a&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;l&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;=&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;0.555.&lt;/mn&gt;&lt;/mrow&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&lt;/mi&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; columnalign=&quot;center&quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;&lt;/mi&gt;&lt;/mtd&gt;&lt;mtd class=&quot;- topic/foreign &quot; /&gt;&lt;/mtr&gt;&lt;/mtable&gt;&lt;/math&gt;" role="presentation"><span id="MJXc-Node-563" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-564" class="mjx-mrow"><span id="MJXc-Node-565" class="mjx-mtable - topic/foreign " style="vertical-align: -2.817em; padding: 0px 0.167em;"><span class="mjx-table"><span id="MJXc-Node-566" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-567" class="mjx-mtd - topic/foreign " style="padding: 0px 0.2em 0.044em 0px; width: 7.691em;"><span id="MJXc-Node-568" class="mjx-mrow"><span id="MJXc-Node-569" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-570" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-571" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em; padding-right: 0.04em;" _msttexthash="6825" _msthash="587">K</span></span><span id="MJXc-Node-572" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-573" class="mjx-mrow - topic/foreign  MJXc-space3"><span id="MJXc-Node-574" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="21827" _msthash="588">5.21</span></span><span id="MJXc-Node-575" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="19565" _msthash="589">×</span></span><span id="MJXc-Node-576" class="mjx-msup - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-577" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="9451" _msthash="590">10</span></span></span><span class="mjx-sup" style="font-size: 70.7%; vertical-align: 0.591em; padding-left: 0px; padding-right: 0.071em;"><span id="MJXc-Node-578" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="5005" _msthash="591">7</span></span></span></span></span></span><span id="MJXc-Node-579" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="592">,</span></span></span></span></span><span id="MJXc-Node-580" class="mjx-mtd - topic/foreign " style="padding: 0px 0.2em 0.044em; width: 6.572em;"><span id="MJXc-Node-581" class="mjx-mrow"><span id="MJXc-Node-582" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-583" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-584" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.312em;" _msttexthash="9737" _msthash="593">k</span></span><span id="MJXc-Node-585" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-586" class="mjx-mrow - topic/foreign  MJXc-space3"><span id="MJXc-Node-587" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="15587" _msthash="594">9.0</span></span><span id="MJXc-Node-588" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="19565" _msthash="595">×</span></span><span id="MJXc-Node-589" class="mjx-msup - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-590" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="9451" _msthash="596">10</span></span></span><span class="mjx-sup" style="font-size: 70.7%; vertical-align: 0.591em; padding-left: 0px; padding-right: 0.071em;"><span id="MJXc-Node-591" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-592" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="597">−</span></span><span id="MJXc-Node-593" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4823" _msthash="598">5</span></span></span></span></span></span></span><span id="MJXc-Node-594" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="599">,</span></span></span></span></span><span id="MJXc-Node-595" class="mjx-mtd - topic/foreign " style="padding: 0px 0.2em 0.044em; width: 6.359em;"><span id="MJXc-Node-596" class="mjx-mrow" style="margin-top: 0.059em;"><span id="MJXc-Node-597" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-598" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-599" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="600">一个</span></span><span id="MJXc-Node-600" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-601" class="mjx-mn - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="22165" _msthash="601">0.18</span></span></span><span id="MJXc-Node-602" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="602">,</span></span></span></span></span><span id="MJXc-Node-603" class="mjx-mtd - topic/foreign " style="padding: 0px 0px 0.044em 0.2em; width: 7.289em;"><span id="MJXc-Node-604" class="mjx-mrow" style="margin-top: 0.092em;"><span id="MJXc-Node-605" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-606" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-607" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em;" _msttexthash="6006" _msthash="603">B</span></span><span id="MJXc-Node-608" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-609" class="mjx-mn - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="29744" _msthash="604">0.185</span></span></span><span id="MJXc-Node-610" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="605">,</span></span></span></span></span></span><span id="MJXc-Node-611" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-612" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em 0.044em 0px;"><span id="MJXc-Node-613" class="mjx-mrow"><span id="MJXc-Node-614" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-615" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-616" class="mjx-msub - topic/foreign "><span class="mjx-base" style="margin-right: -0.04em;"><span id="MJXc-Node-617" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em; padding-right: 0.04em;" _msttexthash="6825" _msthash="606">K</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-618" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="9009" _msthash="607">c</span></span></span></span><span id="MJXc-Node-619" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-620" class="mjx-mrow - topic/foreign  MJXc-space3"><span id="MJXc-Node-621" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="30979" _msthash="608">8.396</span></span><span id="MJXc-Node-622" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="19565" _msthash="609">×</span></span><span id="MJXc-Node-623" class="mjx-msup - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-624" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="9451" _msthash="610">10</span></span></span><span class="mjx-sup" style="font-size: 70.7%; vertical-align: 0.591em; padding-left: 0px; padding-right: 0.071em;"><span id="MJXc-Node-625" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="5096" _msthash="611">8</span></span></span></span></span></span><span id="MJXc-Node-626" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="612">,</span></span></span></span></span><span id="MJXc-Node-627" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em;"><span id="MJXc-Node-628" class="mjx-mrow" style="margin-top: 0.099em;"><span id="MJXc-Node-629" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-630" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-631" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.497em; padding-right: 0.025em;" _msttexthash="86177" _msthash="613">γ</span></span><span id="MJXc-Node-632" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-633" class="mjx-mn - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="22243" _msthash="614">1.27</span></span></span><span id="MJXc-Node-634" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="615">,</span></span></span></span></span><span id="MJXc-Node-635" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em;"><span id="MJXc-Node-636" class="mjx-mrow"><span id="MJXc-Node-637" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-638" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-639" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-640" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.497em;" _msttexthash="87451" _msthash="616">ρ</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-641" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="9009" _msthash="617">c</span></span></span></span><span id="MJXc-Node-642" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-643" class="mjx-mrow - topic/foreign  MJXc-space3"><span id="MJXc-Node-644" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="15444" _msthash="618">1.5</span></span><span id="MJXc-Node-645" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="19565" _msthash="619">×</span></span><span id="MJXc-Node-646" class="mjx-msup - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-647" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="9451" _msthash="620">10</span></span></span><span class="mjx-sup" style="font-size: 70.7%; vertical-align: 0.591em; padding-left: 0px; padding-right: 0.071em;"><span id="MJXc-Node-648" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4641" _msthash="621">3</span></span></span></span></span></span><span id="MJXc-Node-649" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="622">,</span></span></span></span></span><span id="MJXc-Node-650" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0px 0.044em 0.2em;"><span id="MJXc-Node-651" class="mjx-mrow" style="margin-top: 0.109em;"><span id="MJXc-Node-652" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-653" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-654" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-655" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="9919" _msthash="623">m</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-656" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="9009" _msthash="624">c</span></span></span></span><span id="MJXc-Node-657" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-658" class="mjx-mn - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="30056" _msthash="625">226.8</span></span></span><span id="MJXc-Node-659" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="626">,</span></span></span></span></span></span><span id="MJXc-Node-660" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-661" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em 0.044em 0px;"><span id="MJXc-Node-662" class="mjx-mrow" style="margin-top: 0.081em;"><span id="MJXc-Node-663" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-664" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-665" class="mjx-msub - topic/foreign "><span class="mjx-base" style="margin-right: -0.003em;"><span id="MJXc-Node-666" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.312em; padding-right: 0.003em;" _msttexthash="9100" _msthash="627">d</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-667" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em; padding-right: 0.064em;" _msttexthash="2284555" _msthash="628">我</span></span></span></span><span id="MJXc-Node-668" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-669" class="mjx-mn - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="37609" _msthash="629">137.16</span></span></span><span id="MJXc-Node-670" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="630">,</span></span></span></span></span><span id="MJXc-Node-671" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em;"><span id="MJXc-Node-672" class="mjx-mrow"><span id="MJXc-Node-673" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-674" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-675" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-676" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.497em;" _msttexthash="87451" _msthash="631">ρ</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.23em; padding-right: 0.071em;"><span id="MJXc-Node-677" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.497em; padding-right: 0.06em;" _msttexthash="9282" _msthash="632">f</span></span></span></span><span id="MJXc-Node-678" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-679" class="mjx-mrow - topic/foreign  MJXc-space3"><span id="MJXc-Node-680" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="14859" _msthash="633">1.0</span></span><span id="MJXc-Node-681" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="19565" _msthash="634">×</span></span><span id="MJXc-Node-682" class="mjx-msup - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-683" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="9451" _msthash="635">10</span></span></span><span class="mjx-sup" style="font-size: 70.7%; vertical-align: 0.591em; padding-left: 0px; padding-right: 0.071em;"><span id="MJXc-Node-684" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4641" _msthash="636">3</span></span></span></span></span></span><span id="MJXc-Node-685" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="637">,</span></span></span></span></span><span id="MJXc-Node-686" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em;"><span id="MJXc-Node-687" class="mjx-mrow"><span id="MJXc-Node-688" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-689" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-690" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-691" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="9009" _msthash="638">c</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.23em; padding-right: 0.071em;"><span id="MJXc-Node-692" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.497em; padding-right: 0.06em;" _msttexthash="9282" _msthash="639">f</span></span></span></span><span id="MJXc-Node-693" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-694" class="mjx-mrow - topic/foreign  MJXc-space3"><span id="MJXc-Node-695" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="15444" _msthash="640">1.5</span></span><span id="MJXc-Node-696" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="19565" _msthash="641">×</span></span><span id="MJXc-Node-697" class="mjx-msup - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-698" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="9451" _msthash="642">10</span></span></span><span class="mjx-sup" style="font-size: 70.7%; vertical-align: 0.591em; padding-left: 0px; padding-right: 0.071em;"><span id="MJXc-Node-699" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="4641" _msthash="643">3</span></span></span></span></span></span><span id="MJXc-Node-700" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="644">,</span></span></span></span></span><span id="MJXc-Node-701" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0px 0.044em 0.2em;"><span id="MJXc-Node-702" class="mjx-mrow" style="margin-top: 0.109em;"><span id="MJXc-Node-703" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-704" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-705" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-706" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-main-B" style="padding-top: 0.127em; padding-bottom: 0.373em;" _msttexthash="10010" _msthash="645">n</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-707" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em; padding-right: 0.024em;" _msttexthash="8008" _msthash="646">X</span></span></span></span><span id="MJXc-Node-708" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-709" class="mjx-mn - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="14768" _msthash="647">0.0</span></span></span><span id="MJXc-Node-710" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="648">,</span></span></span></span></span></span><span id="MJXc-Node-711" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-712" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em 0.044em 0px;"><span id="MJXc-Node-713" class="mjx-mrow" style="margin-top: 0.109em;"><span id="MJXc-Node-714" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-715" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-716" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-717" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-main-B" style="padding-top: 0.127em; padding-bottom: 0.373em;" _msttexthash="10010" _msthash="649">n</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-718" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em; padding-right: 0.182em;" _msttexthash="8099" _msthash="650">Y</span></span></span></span><span id="MJXc-Node-719" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-720" class="mjx-mn - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="14768" _msthash="651">0.0</span></span></span><span id="MJXc-Node-721" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="652">,</span></span></span></span></span><span id="MJXc-Node-722" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em;"><span id="MJXc-Node-723" class="mjx-mrow" style="margin-top: 0.109em;"><span id="MJXc-Node-724" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-725" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-726" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-727" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-main-B" style="padding-top: 0.127em; padding-bottom: 0.373em;" _msttexthash="10010" _msthash="653">n</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-728" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em; padding-right: 0.04em;" _msttexthash="8190" _msthash="654">Z</span></span></span></span><span id="MJXc-Node-729" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-730" class="mjx-mn - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="14859" _msthash="655">1.0</span></span></span><span id="MJXc-Node-731" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="656">,</span></span></span></span></span><span id="MJXc-Node-732" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em;"><span id="MJXc-Node-733" class="mjx-mrow" style="margin-top: 0.109em;"><span id="MJXc-Node-734" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-735" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-736" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.497em; padding-right: 0.003em;" _msttexthash="9373" _msthash="657">g</span></span><span id="MJXc-Node-737" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-738" class="mjx-mn - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="16523" _msthash="658">9.8</span></span></span><span id="MJXc-Node-739" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="659">,</span></span></span></span></span><span id="MJXc-Node-740" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0px 0.044em 0.2em;"><span id="MJXc-Node-741" class="mjx-mrow"><span id="MJXc-Node-742" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-743" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-744" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-745" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.497em;" _msttexthash="10192" _msthash="660">p</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-746" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-747" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="661">一个</span></span><span id="MJXc-Node-748" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-749" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="662">t</span></span><span id="MJXc-Node-750" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-751" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="9919" _msthash="663">m</span></span></span></span></span><span id="MJXc-Node-752" class="mjx-mo - topic/foreign  MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.065em; padding-bottom: 0.312em;">=</span></span><span id="MJXc-Node-753" class="mjx-mrow - topic/foreign  MJXc-space3"><span id="MJXc-Node-754" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="16523" _msthash="664">9.8</span></span><span id="MJXc-Node-755" class="mjx-mo - topic/foreign  MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="19565" _msthash="665">×</span></span><span id="MJXc-Node-756" class="mjx-msup - topic/foreign  MJXc-space2"><span class="mjx-base"><span id="MJXc-Node-757" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.373em;" _msttexthash="9451" _msthash="666">10</span></span></span><span class="mjx-sup" style="font-size: 70.7%; vertical-align: 0.591em; padding-left: 0px; padding-right: 0.071em;"><span id="MJXc-Node-758" class="mjx-mn - topic/foreign " style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4732" _msthash="667">4</span></span></span></span></span></span><span id="MJXc-Node-759" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.182em; padding-bottom: 0.559em;" _msttexthash="4004" _msthash="668">,</span></span></span></span></span></span><span id="MJXc-Node-760" class="mjx-mtr - topic/foreign "><span id="MJXc-Node-761" class="mjx-mtd - topic/foreign " style="padding: 0.044em 0.2em 0px 0px;"><span id="MJXc-Node-762" class="mjx-mrow" style="margin-top: 0.098em;"><span id="MJXc-Node-763" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-764" class="mjx-msub - topic/foreign "><span class="mjx-base" style="margin-right: -0.12em;"><span id="MJXc-Node-765" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.25em; padding-right: 0.12em;" _msttexthash="7644" _msthash="669">T</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.23em; padding-right: 0.071em;"><span id="MJXc-Node-766" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-767" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.497em; padding-right: 0.06em;" _msttexthash="9282" _msthash="670">f</span></span><span id="MJXc-Node-768" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-769" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="671">我</span></span><span id="MJXc-Node-770" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-771" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.25em; padding-bottom: 0.312em;" _msttexthash="10010" _msthash="672">n</span></span><span id="MJXc-Node-772" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-773" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.188em; padding-bottom: 0.312em;" _msttexthash="3898128" _msthash="673">一个</span></span><span id="MJXc-Node-774" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-775" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.312em;" _msttexthash="9828" _msthash="674">l</span></span></span></span></span><span id="MJXc-Node-776" class="mjx-mo - topic/foreign  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id="MJXc-Node-785" class="mjx-mrow" style="margin-top: 0.8em; margin-bottom: 0.2em;"></span></span></span></span></span></span></span><span class="MJX_Assistive_MathML MJX_Assistive_MathML_Block" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML" display="block"><mtable class="- topic/foreign " rowspacing="0.2ex" columnspacing="0.4em"><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="center"><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="6825" _mstHash="676">K</mi><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="21827" _mstHash="677">5.21</mn><mo class="- topic/foreign " _mstTextHash="19565" _mstHash="678">×</mo><msup class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="9451" _mstHash="679">10</mn><mn class="- topic/foreign " _mstTextHash="5005" _mstHash="680">7</mn></msup></mrow></mrow><mo 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_mstHash="688">一个</mi><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign " _mstTextHash="22165" _mstHash="689">0.18</mn></mrow><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="690">,</mo></mrow></mtd><mtd class="- topic/foreign " columnalign="center"><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="6006" _mstHash="691">B</mi><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign " _mstTextHash="29744" _mstHash="692">0.185</mn></mrow><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="693">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="center"><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="6825" _mstHash="694">K</mi><mi class="- topic/foreign " _mstTextHash="9009" _mstHash="695">c</mi></msub><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="30979" _mstHash="696">8.396</mn><mo class="- topic/foreign " _mstTextHash="19565" _mstHash="697">×</mo><msup class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="9451" _mstHash="698">10</mn><mn class="- topic/foreign " _mstTextHash="5096" _mstHash="699">8</mn></msup></mrow></mrow><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="700">,</mo></mrow></mtd><mtd class="- topic/foreign " columnalign="center"><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="86177" _mstHash="701">γ</mi><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign " _mstTextHash="22243" _mstHash="702">1.27</mn></mrow><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="703">,</mo></mrow></mtd><mtd class="- topic/foreign " columnalign="center"><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="87451" 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class="- topic/foreign " _mstTextHash="4004" _mstHash="714">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="center"><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="9100" _mstHash="715">d</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="716">我</mi></msub><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign " _mstTextHash="37609" _mstHash="717">137.16</mn></mrow><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="718">,</mo></mrow></mtd><mtd class="- topic/foreign " columnalign="center"><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="87451" _mstHash="719">ρ</mi><mi class="- topic/foreign " _mstTextHash="9282" _mstHash="720">f</mi></msub><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign " 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_mstTextHash="16523" _mstHash="746">9.8</mn></mrow><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="747">,</mo></mrow></mtd><mtd class="- topic/foreign " columnalign="center"><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10192" _mstHash="748">p</mi><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="749">一个</mi><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="750">⁢</mo><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="751">t</mi><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="752">⁢</mo><mi class="- topic/foreign " _mstTextHash="9919" _mstHash="753">m</mi></mrow></msub><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="16523" _mstHash="754">9.8</mn><mo class="- topic/foreign " _mstTextHash="19565" _mstHash="755">×</mo><msup class="- topic/foreign "><mn class="- topic/foreign " _mstTextHash="9451" _mstHash="756">10</mn><mn class="- topic/foreign " _mstTextHash="4732" _mstHash="757">4</mn></msup></mrow></mrow><mo class="- topic/foreign " _mstTextHash="4004" _mstHash="758">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd class="- topic/foreign " columnalign="center"><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="7644" _mstHash="759">T</mi><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="9282" _mstHash="760">f</mi><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="761">⁢</mo><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="762">我</mi><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="763">⁢</mo><mi class="- topic/foreign " _mstTextHash="10010" _mstHash="764">n</mi><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="765">⁢</mo><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="766">一个</mi><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="767">⁢</mo><mi class="- topic/foreign " _mstTextHash="9828" _mstHash="768">l</mi></mrow></msub><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign " _mstTextHash="36998" _mstHash="769">0.555.</mn></mrow></mtd><mtd class="- topic/foreign " columnalign="center"><mi class="- topic/foreign "></mi></mtd><mtd class="- topic/foreign " columnalign="center"><mi class="- topic/foreign "></mi></mtd><mtd class="- topic/foreign "></mtd></mtr></mtable></math></span></span></span><script type="math/mml" id="MathJax-Element-37"><math class="- topic/foreign " display="block"><mtable rowspacing="0.2ex" columnspacing="0.4em" class="- topic/foreign "><mtr class="- topic/foreign "><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">K</mi><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign ">5.21</mn><mo class="- topic/foreign ">×</mo><msup class="- topic/foreign "><mn class="- topic/foreign ">10</mn><mn class="- topic/foreign ">7</mn></msup></mrow></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">k</mi><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign ">9.0</mn><mo class="- topic/foreign ">×</mo><msup class="- topic/foreign "><mn class="- topic/foreign ">10</mn><mrow class="- topic/foreign "><mo class="- topic/foreign ">-</mo><mn class="- topic/foreign ">5</mn></mrow></msup></mrow></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign ">0.18</mn></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">B</mi><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign ">0.185</mn></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">K</mi><mi class="- topic/foreign ">c</mi></msub><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign ">8.396</mn><mo class="- topic/foreign ">×</mo><msup class="- topic/foreign "><mn class="- topic/foreign ">10</mn><mn class="- topic/foreign ">8</mn></msup></mrow></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">γ</mi><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign ">1.27</mn></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">ρ</mi><mi class="- topic/foreign ">c</mi></msub><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign ">1.5</mn><mo class="- topic/foreign ">×</mo><msup class="- topic/foreign "><mn class="- topic/foreign ">10</mn><mn class="- topic/foreign ">3</mn></msup></mrow></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">m</mi><mi class="- topic/foreign ">c</mi></msub><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign ">226.8</mn></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">d</mi><mi class="- topic/foreign ">I</mi></msub><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign ">137.16</mn></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">ρ</mi><mi class="- topic/foreign ">f</mi></msub><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign ">1.0</mn><mo class="- topic/foreign ">×</mo><msup class="- topic/foreign "><mn class="- topic/foreign ">10</mn><mn class="- topic/foreign ">3</mn></msup></mrow></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">c</mi><mi class="- topic/foreign ">f</mi></msub><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign ">1.5</mn><mo class="- topic/foreign ">×</mo><msup class="- topic/foreign "><mn class="- topic/foreign ">10</mn><mn class="- topic/foreign ">3</mn></msup></mrow></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi mathvariant="bold" class="- topic/foreign ">n</mi><mi class="- topic/foreign ">X</mi></msub><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign ">0.0</mn></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi mathvariant="bold" class="- topic/foreign ">n</mi><mi class="- topic/foreign ">Y</mi></msub><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign ">0.0</mn></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi mathvariant="bold" class="- topic/foreign ">n</mi><mi class="- topic/foreign ">Z</mi></msub><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign ">1.0</mn></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">g</mi><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign ">9.8</mn></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">p</mi><mrow class="- topic/foreign "><mi class="- topic/foreign ">a</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">t</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">m</mi></mrow></msub><mo class="- topic/foreign ">=</mo><mrow class="- topic/foreign "><mn class="- topic/foreign ">9.8</mn><mo class="- topic/foreign ">×</mo><msup class="- topic/foreign "><mn class="- topic/foreign ">10</mn><mn class="- topic/foreign ">4</mn></msup></mrow></mrow><mo class="- topic/foreign ">,</mo></mrow></mtd></mtr><mtr class="- topic/foreign "><mtd columnalign="center" class="- topic/foreign "><mrow class="- topic/foreign "><msub class="- topic/foreign "><mi class="- topic/foreign ">T</mi><mrow class="- topic/foreign "><mi class="- topic/foreign ">f</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">i</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">n</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">a</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">l</mi></mrow></msub><mo class="- topic/foreign ">=</mo><mn class="- topic/foreign ">0.555.</mn></mrow></mtd><mtd columnalign="center" class="- topic/foreign "><mi class="- topic/foreign "></mi></mtd><mtd columnalign="center" class="- topic/foreign "><mi class="- topic/foreign "></mi></mtd><mtd class="- topic/foreign "></mtd></mtr></mtable></math></script></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="770">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">BUBBLE</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="771">Abaqus/CAE 用法</p>
      <p xmlns="" _msttexthash="448319742" _msthash="772">气泡振幅在 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/CAE</span> 中不受支持。
      但是，水下爆炸的气泡加载在
      使用 <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqupper-nochk" _istranslated="1">UNDEX</span> 电荷的交互模块
      属性定义。</p></div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig" id="simaprc-c-amplitude-data-bub__simaprc-c-pamp-bubble-load"><span xmlns="" class="figcap" _msttexthash="327863107" _msthash="773">图7.气泡振幅定义示例：（a） 气泡半径和 （b）
       流体表面下气泡中心的深度。</span>
        
        <br><img xmlns="" class="image" src="blogpic/pamp-bubble-load-nls.png"><br>
      </div>
      </div>
      </div>
      
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-data-user">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="44552651" _msthash="774">通过用户子例程定义振幅</h3>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="1752596157" _msthash="775">选择用户定义方法，通过编码定义幅度曲线
       在用户子程序 <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAESUBRefMap/simasub-c-uamp.htm#simasub-c-uamp" title="User subroutine to specify amplitudes." _istranslated="1"><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqusersub" _istranslated="1">UAMP</span></a> （<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/Standard</span>） 中
       或 <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAESUBRefMap/simasub-c-vuamp.htm#simasub-c-vuamp" title="User subroutine to specify amplitudes." _istranslated="1"><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqusersub" _istranslated="1">VUAMP</span></a>（<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/Explicit</span>）。
       您可以定义幅度函数在时间上的值，并可选择
       函数的导数和积分的值
       按照 <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAESUBRefMap/simasub-c-uamp.htm" title="User subroutine to specify amplitudes." _istranslated="1">UAMP</a> 和 <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAESUBRefMap/simasub-c-vuamp.htm" title="User subroutine to specify amplitudes." _istranslated="1">VUAMP</a> 中的概述实施。</p>
      <p _msttexthash="563430504" _msthash="776">您可以使用任意数量的属性来计算振幅，
       并且您可以使用任意数量的可以更新的状态变量
       每个振幅定义都是独立的。</p>
      <p _msttexthash="870042524" _msthash="777">在 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/Standard</span> 中，复杂的特征值提取不支持用户定义的振幅，
       线性动态过程和具有响应的稳态动态分析
       直接根据物理自由度计算。</p>
      <p _msttexthash="2446268526" _msthash="778">此外，与解决方案相关的传感器可用于定义
       用户自定义振幅。传感器可以通过其名称进行识别，并且
       两个实用程序允许提取内部的当前传感器值
       用户子例程（请参阅<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAESUBRefMap/simasub-c-getsensor.htm" title="Given the user-defined name for a sensor, utility routines can be used to obtain the sensor ID or the sensor value using a computationally efficient searching technique." _istranslated="1">获取传感器信息</a>）。
       可以使用此功能实现简单的控制/逻辑模型，作为
       在<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEEXARefMap/simaexa-c-crank.htm" title="This example illustrates the use of connector elements to model kinematic constraints between rigid bodies in a multi-body mechanism." _istranslated="1">曲柄机构</a>中说明。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="779">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">USER</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">PROPERTIES</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">m</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">VARIABLES</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">n</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="780">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">User</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Number of variables</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">n</span></pre><p xmlns="" _msttexthash="84868524" _msthash="781">用户定义的振幅属性在 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/CAE</span> 中不受支持。</p></div>
      </div>
      </div>
      </div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="nested1 topic concept sma-topic" id="simaprc-c-amplitude-data-actuator">
      <p xmlns=""><map name="FPMap1"><area href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#hj-top" title="Back to Top" shape="rect" coords="416, 0, 435, 10"></map><img border="0" src="blogpic/butix_top_wline.png" width="436" height="11" usemap="#FPMap1"></p><h2 xmlns="" class="topictitle2 title" _msttexthash="56697524" _msthash="782">通过协同仿真定义执行器振幅</h2>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="3513768466" _msthash="783">可以在任何给定时间导入执行器振幅的当前值
       从与逻辑建模程序的协同仿真（请参阅<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEANLRefMap/simaanl-c-cosimulationover.htm" title="The co-simulation technique is a capability for run-time coupling of Abaqus and other analysis programs." _istranslated="1">关于协同仿真</a>）。
       在执行器振幅定义中指定的名称用作执行器
       用于协同模拟目的的名称。因此，在给定时间，每个执行器都是
       与一个实数相关联 - 振幅的当前值。与任何
       振幅定义，用户指定的名称可以与
       任何可以参考振幅的 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus</span> 特征。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="784">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">ACTUATOR</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="785">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Actuator</span></pre></div>
      </div>
      </div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="nested1 topic concept sma-topic" id="simaprc-c-amplitude-bc">
      <p xmlns=""><map name="FPMap1"><area href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#hj-top" title="Back to Top" shape="rect" coords="416, 0, 435, 10"></map><img border="0" src="blogpic/butix_top_wline.png" width="436" height="11" usemap="#FPMap1"></p><h2 xmlns="" class="topictitle2 title" _msttexthash="62721490" _msthash="786">将振幅定义与边界条件结合使用</h2>
      
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="1842924135" _msthash="787">当使用幅度曲线将模型的变量规定为
       边界条件（通过参考边界条件的振幅
       定义），变量的第一和二次导数也可以是
       需要。例如，可以为
       通过幅度变化进行直接积分动态分析步骤;在此
       <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus</span> 必须计算相应的速度和加速度。</p>
      <p><font _mstmutation="1" _msttexthash="2956096091" _msthash="788">当位移时间历史由分段线性定义时
       振幅变化（表格或等间距振幅定义），
       相应的速度是分段恒定的，加速度可以是
       在幅度定义中给出的每个时间间隔结束时无限
       表，如图<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-bc__simaprc-c-pamplitude-smoothing" _mstmutation="1" _istranslated="1">8</a>（a）所示。
       这种行为是不合理的。（在<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _mstmutation="1" _istranslated="1">Abaqus/显式</span>时间中，振幅曲线的导数通常基于有限差分，
       如</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-38-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mfrac class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;[&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;+&lt;/mo&gt;&lt;mn class=&quot;- topic/foreign &quot;&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;-&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;A&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;(&lt;/mo&gt;&lt;msub class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;i&lt;/mi&gt;&lt;/msub&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow class=&quot;- topic/foreign &quot;&gt;&lt;mi class=&quot;- topic/foreign &quot; mathvariant=&quot;normal&quot;&gt;&amp;#x394;&lt;/mi&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2062;&lt;/mo&gt;&lt;mi class=&quot;- topic/foreign &quot;&gt;t&lt;/mi&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-786" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-787" class="mjx-mrow"><span id="MJXc-Node-788" class="mjx-mfrac - topic/foreign "><span class="mjx-box MJXc-stacked" style="width: 4.79em; padding: 0px 0.12em;"><span class="mjx-numerator" style="font-size: 70.7%; width: 6.774em; top: -1.664em;"><span id="MJXc-Node-789" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-790" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">[</span></span><span id="MJXc-Node-791" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-792" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-793" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="789">一个</span></span><span id="MJXc-Node-794" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-795" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-796" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-797" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-798" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="790">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-799" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-800" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="791">我</span></span><span id="MJXc-Node-801" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.312em; padding-bottom: 0.435em;">+</span></span><span id="MJXc-Node-802" class="mjx-mn - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="4459" _msthash="792">1</span></span></span></span></span><span id="MJXc-Node-803" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span></span><span id="MJXc-Node-804" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="margin-top: 0.003em; padding-bottom: 0.312em;" _msttexthash="793702" _msthash="793">−</span></span><span id="MJXc-Node-805" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-806" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.497em; padding-bottom: 0.25em;" _msttexthash="3898128" _msthash="794">一个</span></span><span id="MJXc-Node-807" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-808" class="mjx-mrow - topic/foreign "><span id="MJXc-Node-809" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">(</span></span><span id="MJXc-Node-810" class="mjx-msub - topic/foreign "><span class="mjx-base"><span id="MJXc-Node-811" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="795">t</span></span></span><span class="mjx-sub" style="font-size: 70.7%; vertical-align: -0.212em; padding-right: 0.071em;"><span id="MJXc-Node-812" class="mjx-mi - topic/foreign " style=""><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="2284555" _msthash="796">我</span></span></span></span><span id="MJXc-Node-813" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">)</span></span></span></span></span><span id="MJXc-Node-814" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.62em;">]</span></span></span></span><span class="mjx-denominator" style="font-size: 70.7%; width: 6.774em; bottom: -0.684em;"><span id="MJXc-Node-815" class="mjx-mrow - topic/foreign " style=""><span id="MJXc-Node-816" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.435em; padding-bottom: 0.312em;" _msttexthash="83356" _msthash="797">Δ</span></span><span id="MJXc-Node-817" class="mjx-mo - topic/foreign "><span class="mjx-char"></span></span><span id="MJXc-Node-818" class="mjx-mi - topic/foreign "><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.373em; padding-bottom: 0.312em;" _msttexthash="10556" _msthash="798">t</span></span></span></span><span class="mjx-line" style="border-bottom: 1.3px solid; top: -0.289em; width: 4.79em;"></span></span><span class="mjx-vsize" style="height: 1.661em; vertical-align: -0.484em;"></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mfrac class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">[</mo><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="799">一个</mi><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="800">⁢</mo><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="801">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="802">我</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign " _mstTextHash="4459" _mstHash="803">1</mn></mrow></msub><mo class="- topic/foreign ">)</mo></mrow></mrow><mo class="- topic/foreign ">-</mo><mrow class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="3898128" _mstHash="804">一个</mi><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="805">⁢</mo><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><msub class="- topic/foreign "><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="806">t</mi><mi class="- topic/foreign " _mstTextHash="2284555" _mstHash="807">我</mi></msub><mo class="- topic/foreign ">)</mo></mrow></mrow></mrow><mo class="- topic/foreign ">]</mo></mrow><mrow class="- topic/foreign "><mi class="- topic/foreign " mathvariant="normal" _mstTextHash="83356" _mstHash="808">Δ</mi><mo class="- topic/foreign " _mstTextHash="754390" _mstHidden="1" _mstHash="809">⁢</mo><mi class="- topic/foreign " _mstTextHash="10556" _mstHash="810">t</mi></mrow></mfrac></math></span></span><script type="math/mml" id="MathJax-Element-38"><math class="- topic/foreign "><mfrac class="- topic/foreign "><mrow class="- topic/foreign "><mo class="- topic/foreign ">[</mo><mrow class="- topic/foreign "><mrow class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mo class="- topic/foreign ">⁢</mo><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mrow class="- topic/foreign "><mi class="- topic/foreign ">i</mi><mo class="- topic/foreign ">+</mo><mn class="- topic/foreign ">1</mn></mrow></msub><mo class="- topic/foreign ">)</mo></mrow></mrow><mo class="- topic/foreign ">-</mo><mrow class="- topic/foreign "><mi class="- topic/foreign ">A</mi><mo class="- topic/foreign ">⁢</mo><mrow class="- topic/foreign "><mo class="- topic/foreign ">(</mo><msub class="- topic/foreign "><mi class="- topic/foreign ">t</mi><mi class="- topic/foreign ">i</mi></msub><mo class="- topic/foreign ">)</mo></mrow></mrow></mrow><mo class="- topic/foreign ">]</mo></mrow><mrow class="- topic/foreign "><mi mathvariant="normal" class="- topic/foreign ">Δ</mi><mo class="- topic/foreign ">⁢</mo><mi class="- topic/foreign ">t</mi></mrow></mfrac></math></script></span><font _mstmutation="1" _msttexthash="126398363" _msthash="811">,
       因此，存在一些与时间离散化相关的固有平滑。</font></p>
      <p _msttexthash="1090805430" _msthash="812">您可以将分段线性位移变化修改为
       分段线性和分段二次变化的组合通过
       平滑。平滑可确保速度在
       幅度定义的时间段，并且加速度不再具有
       奇点，如图<a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#simaprc-c-amplitude-bc__simaprc-c-pamplitude-smoothing" _istranslated="1">8</a>（b）所示。</p>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig" id="simaprc-c-amplitude-bc__simaprc-c-pamplitude-smoothing"><span xmlns="" class="figcap" _msttexthash="39898690" _msthash="813">图8.分段线性位移定义。</span>
        
        <br><img xmlns="" class="image" src="blogpic/pamplitude-smoothing-nls.png"><br>
      </div>
      
      <p _msttexthash="1280178289" _msthash="814">当速度时程由分段线性振幅定义时
       变化，相应的加速度是分段恒定的。平滑罐
       用于将分段线速度变化修改为
       分段线性和分段二次变化。平滑可确保
       加速度在振幅的时间段内连续变化
       定义。</p>
      <p><font _mstmutation="1" _msttexthash="1169480988" _msthash="815">您指定 <span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable" _mstmutation="1" _istranslated="1">t</span>，时间间隔的小数
       在每个时间点之前和之后，其中分段线性时间
       变化将被平滑二次时间变化所取代。默认
       在<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _mstmutation="1" _istranslated="1">阿巴库斯/标准</span>中是 <span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable" _mstmutation="1" _istranslated="1">t</span>=0.25;<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _mstmutation="1" _istranslated="1">Abaqus/Explicit</span> 中的默认值为 <span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable" _mstmutation="1" _istranslated="1">t</span>=0.0。允许的范围为 0.0</font><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-39-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;lt;&lt;/mo&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-819" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-820" class="mjx-mrow"><span id="MJXc-Node-821" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.25em; padding-bottom: 0.373em;">&lt;</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mo class="- topic/foreign ">&lt;</mo></math></span></span><script type="math/mml" id="MathJax-Element-39"><math class="- topic/foreign "><mo class="- topic/foreign ">&lt;</mo></math></script></span><span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable" _msttexthash="10556" _msthash="816">t</span><span class="inlineequation"><span class="MathJax_Preview" style="color: inherit;"></span><span id="MathJax-Element-40-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="&lt;math class=&quot;- topic/foreign &quot; xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mo class=&quot;- topic/foreign &quot;&gt;&amp;#x2264;&lt;/mo&gt;&lt;/math&gt;" role="presentation" style="font-size: 135%; position: relative;"><span id="MJXc-Node-822" class="mjx-math - topic/foreign " role="math" aria-hidden="true"><span id="MJXc-Node-823" class="mjx-mrow"><span id="MJXc-Node-824" class="mjx-mo - topic/foreign "><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.373em; padding-bottom: 0.497em;" _msttexthash="801164" _msthash="817">≤</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math class="- topic/foreign " xmlns="http://www.w3.org/1998/Math/MathML"><mo class="- topic/foreign " _mstTextHash="801164" _mstHash="818">≤</mo></math></span></span><script type="math/mml" id="MathJax-Element-40"><math class="- topic/foreign "><mo class="- topic/foreign ">≤</mo></math></script></span><font _mstmutation="1" _msttexthash="173783441" _msthash="819">0.5. 对于包含大
       时间间隔，以避免与指定定义严重偏差。</font></p>
      <p _msttexthash="4016474397" _msthash="820">在 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/显式</span>如果
       位移跳跃使用振幅曲线（即开始
       使用振幅函数定义的位移与
       当时的位移），这个位移跳跃将被忽略。
       置换边界条件在 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/显式</span>中强制执行
       使用振幅曲线斜率的增量方式。为了避免
       “噪声”解决方案，在不使用平滑时可能导致 <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/显式</span>，最好指定
       节点而不是位移历史（参见 <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-boundary.htm" _istranslated="1">Abaqus/Standard 和 Abaqus/Explicit 中的边界条件</a>）。</p>
      <p _msttexthash="969847255" _msthash="821">当振幅定义与规定的条件一起使用时，不
       需要评估时间导数（例如，集中载荷，
       分布式荷载、温度场等，或静态分析），采用
       平滑将被忽略。</p>
      <p _msttexthash="1355782064" _msthash="822">当使用平滑步长幅度定义位移时间历史时
       曲线，每个数据点的速度和加速度将为零
       指定，尽管平均速度和加速度很可能不为零。
       因此，此幅度定义应仅用于定义（平滑）步长
       功能。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="823">输入文件使用情况</p><p xmlns="" _msttexthash="42007966" _msthash="824">使用以下任一选项：</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">TABULAR</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">SMOOTH</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">t</span> 
      <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">EQUALLY SPACED</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">SMOOTH</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">t</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="825">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: choose <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Tabular</span> or <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Equally spaced</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Smoothing: Specify:</span> <span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">t</span></pre></div>
      </div>
      </div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="nested1 topic concept sma-topic" id="simaprc-c-amplitude-t-UsingAnAmplitudeDefinitionWithSecondaryBaseMotionInModalDynamics-sma-topic19">
      <p xmlns=""><map name="FPMap1"><area href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#hj-top" title="Back to Top" shape="rect" coords="416, 0, 435, 10"></map><img border="0" src="blogpic/butix_top_wline.png" width="436" height="11" usemap="#FPMap1"></p><h2 xmlns="" class="topictitle2 title" _msttexthash="123773689" _msthash="826">在模态中使用具有次级基本运动的振幅定义
       动力学</h2>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="2990507598" _msthash="827">当使用幅度曲线将模型的变量规定为
       模态动力学过程中的次级基本运动（通过参考
       模态动态过程中基本运动定义的振幅），
       可能还需要变量的第一次或第二次导数。为
       例如，可以为二级碱定义位移的时间历史
       模态动力学过程中的运动。在这种情况下，<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus</span> 必须计算相应的加速度。</p>
      <p _msttexthash="9698757003" _msthash="828">模态动力学过程使用精确的解来响应
       分段线性力。因此，次要基本运动定义是
       应用为分段线性加速度历史。当位移型或
       速度型基本运动用于定义位移或速度时间
       历史和幅度变化使用表格，等间距，
       使用周期性、调制或指数衰减定义，算法
       加速度是根据表格数据（振幅数据
       在模态动力学过程中使用的时间值处评估）。在最后
       幅度曲线在该增量上呈线性的任何时间增量，
       前一个增量的线性，以及振幅变化的斜率
       在两个增量相等时，此算法加速再现
       位移时间历史的精确位移和速度或确切的位移
       速度时程的速度。</p>
      <p _msttexthash="1355782064" _msthash="829">当使用平滑步长幅度定义位移时间历史时
       曲线，每个数据点的速度和加速度将为零
       指定，尽管平均速度和加速度很可能不为零。
       因此，此幅度定义应仅用于定义（平滑）步长
       功能。</p></div>
      </div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="nested1 topic concept sma-topic" id="simaprc-c-amplitude-many">
      <p xmlns=""><map name="FPMap1"><area href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#hj-top" title="Back to Top" shape="rect" coords="416, 0, 435, 10"></map><img border="0" src="blogpic/butix_top_wline.png" width="436" height="11" usemap="#FPMap1"></p><h2 xmlns="" class="topictitle2 title" _msttexthash="28082275" _msthash="830">定义多条振幅曲线</h2>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="5544924255" _msthash="831">您可以定义任意数量的振幅曲线，并从任何幅度曲线引用它们
       载荷、边界条件或预定义字段定义。例如，一个
       振幅曲线可用于指定一组节点的速度，而
       另一个振幅曲线可用于指定压力载荷的大小
       在身体上。如果速度和压力同时遵循
       然而，从历史上看，它们都可以指相同的振幅曲线。有一个
       <span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">Abaqus/Standard</span>中的异常：
       只能有一个与溶液相关的振幅（用于超塑性成形）
       在每一步中都处于活动状态。</p></div>
      </div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="nested1 topic concept sma-topic" id="simaprc-c-amplitude-t-ScalingAndShiftingAmplitudeCurves-sma-topic21">
      <p xmlns=""><map name="FPMap1"><area href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#hj-top" title="Back to Top" shape="rect" coords="416, 0, 435, 10"></map><img border="0" src="blogpic/butix_top_wline.png" width="436" height="11" usemap="#FPMap1"></p><h2 xmlns="" class="topictitle2 title" _msttexthash="34311485" _msthash="832">缩放和偏移幅度曲线</h2>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="4233484502" _msthash="833">定义振幅时，您可以缩放和偏移时间和幅度。
       例如，当您的振幅数据需要转换时，这会很有帮助
       到不同的单位系统或重用现有振幅数据来定义
       类似的振幅曲线。如果同时应用缩放和移位
       时间，振幅值首先缩放，然后偏移。振幅
       平移和缩放可应用于除
       对于解决方案依赖、气泡和用户;用于执行器振幅定义
       类型，仅支持幅度大小的缩放和偏移。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="834">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">SHIFTX</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">shiftx_value</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">SHIFTY</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">shifty_value</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">SCALEX</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">scalex_value</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">SCALEY</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">scaley_value</span></pre></div>
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="835">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">The scaling and shifting of amplitude curves is not supported in <span xmlns="http://www.w3.org/1999/xhtml" class="ph">Abaqus/CAE</span>.</pre></div>
      </div>
      </div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="nested1 topic concept sma-topic" id="simaprc-c-amplitude-file">
      <p xmlns=""><map name="FPMap1"><area href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#hj-top" title="Back to Top" shape="rect" coords="416, 0, 435, 10"></map><img border="0" src="blogpic/butix_top_wline.png" width="436" height="11" usemap="#FPMap1"></p><h2 xmlns="" class="topictitle2 title" _msttexthash="37427013" _msthash="836">从备用文件中读取数据</h2>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="91982852" _msthash="837">振幅曲线的数据可以包含在单独的文件中。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="838">输入文件使用情况</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">NAME</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">name</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">INPUT</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph replaceable">file_name</span></pre><p xmlns="" _msttexthash="154147552" _msthash="839">如果省略 <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter" _istranslated="1">INPUT</span> 参数，则假定数据行跟随
      关键字行。</p></div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="840">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: any type: click mouse button 3 while holding the cursor over the data table, and select <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Read from File</span></pre></div>
      </div>
      </div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="nested1 topic concept sma-topic" id="simaprc-c-amplitude-baseline">
      <p xmlns=""><map name="FPMap1"><area href="https://abaqus-docs.mit.edu/2017/English/SIMACAEPRCRefMap/simaprc-c-amplitude.htm#hj-top" title="Back to Top" shape="rect" coords="416, 0, 435, 10"></map><img border="0" src="blogpic/butix_top_wline.png" width="436" height="11" usemap="#FPMap1"></p><h2 xmlns="" class="topictitle2 title" _msttexthash="54359305" _msthash="841"><span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">阿巴库斯/标准</span>中的基线校正</h2>
      
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="2991246648" _msthash="842">当使用振幅定义来定义加速度历史记录时
       时域（例如地震的地震记录），
       随着时间的推移，加速度记录的积分可能会导致相对
       活动结束时的大位移。此行为通常发生
       由于仪器错误或采样频率不是
       足以捕获实际的加速历史记录。在<span xmlns="http://www.w3.org/1999/xhtml" class="ph" _istranslated="1">阿巴库斯/标准</span>中
       可以通过使用“基线校正”来补偿它。</p>
      <p _msttexthash="677758016" _msthash="843">基线校正方法允许修改加速度历史记录
       以最小化从时间获得的位移的整体漂移
       给定加速度的积分。它仅与表格或
       等间距振幅定义。</p>
      <p _msttexthash="376936924" _msthash="844">仅当幅度参考为
       直接积分动态分析中的加速度边界条件
       或作为模态动力学中的加速度基础运动。</p><div xmlns="http://www.w3.org/1999/xhtml" class="fignone fig usage"><p xmlns="" _msttexthash="26762996" _msthash="845">输入文件使用情况</p><p xmlns="" _msttexthash="82791267" _msthash="846">使用以下两个选项包括基线
      校正：</p><pre xmlns="" class="codeblock"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">AMPLITUDE</span></a>, <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparameter">DEFINITION</span>=<span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">TABULAR</span> or <span xmlns="http://www.w3.org/1999/xhtml" class="ph abqparamvalue">EQUALLY SPACED</span>
      <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-baselinecorrection.htm#simakey-r-baselinecorrection" title="Include baseline correction."><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword">BASELINE CORRECTION</span></a></pre><p xmlns="" _msttexthash="88715861" _msthash="847"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-baselinecorrection.htm#simakey-r-baselinecorrection" title="Include baseline correction." _istranslated="1"><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword" _istranslated="1">基线校正</span></a>选项必须紧跟在
      <a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAEKEYRefMap/simakey-r-amplitude.htm#simakey-r-amplitude" title="Define an amplitude curve." _istranslated="1"><span xmlns="http://www.w3.org/1999/xhtml" class="keyword abqkeyword" _istranslated="1">扩增</span></a>选项。</p></div>
      
      <div xmlns="http://www.w3.org/1999/xhtml" class="fignone usage abqinterface(interactive)"><p xmlns="" _msttexthash="13271687" _msthash="848">Abaqus/CAE 用法</p><pre xmlns="" class="codeblock">Load or Interaction module: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Create Amplitude</span>: choose <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Tabular</span> or <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Equally spaced</span>: <span xmlns="http://www.w3.org/1999/xhtml" class="ph guilabel">Baseline Correction</span></pre></div>
      </div>
      
      <div class="nested2 topic concept sma-topic" id="simaprc-c-amplitude-t-EffectsOfBaselineCorrection-sma-topic23">
      <h3 xmlns="" class="topictitle3 title" _msttexthash="24982633" _msthash="849">基线校正的效果</h3>
      <div xmlns="" class="body conbody sma-topic-body">
      <p _msttexthash="2050284301" _msthash="850">通过添加加速度的二次变化来修改加速度
       及时达到加速度定义。选择二次变数为
       最小化每个校正间隔期间的均方速度。分开
       可以为不同的校正间隔添加二次变化
       通过定义校正间隔来定义幅度。或者，
       整个幅度历史可用作单个校正间隔。</p>
      <p _msttexthash="1353662037" _msthash="851">使用更多的校正间隔可以更严格地控制任何校正间隔
       位移中的“漂移”以牺牲对给定的更多修改为代价
       加速跟踪。无论哪种情况，修改都从
       振幅变化，并假设初始速度在
       那个时间是零。</p>
      <p _msttexthash="129284350" _msthash="852"><a class="xref" href="https://abaqus-docs.mit.edu/2017/English/SIMACAETHERefMap/simathe-c-baselinecorr.htm" title="Abaqus/Standard offers baseline correction of acceleration records for a time domain analysis." _istranslated="1">加速度图的</a>基线校正中详细介绍了基线校正技术。</p></div>
      </div>
      </div>
      
      </div></td></tr></tbody></table>
        
        <p><time datetime="2023-02-04" pubdate="2023-02-04">2023/02/04 21:37:01</time></p>
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